Here's the first oneshot for the collection! This'll mostly be fluff, so hopefully you'll get some happy feels from it!
Feel free to send me headcannons and ideas to write up!

Disclaimer: I don't own Gravity Falls!

"You know," Pacifica panted as her feet pounded against the ground beneath her. "When I said 'I'd love to go for a run through the woods with you,' this wasn't exactly what I had in mind!" Beside her, Dipper ran. The dirty look she threw at him only made the exhilarated smile on his face widen.

He was enjoying this.

Bastard.

She'd never really thought that Dipper Pines would grow up to be the adrenaline junkie he was - if she had known prior to the start of their relationship not even two weeks ago, she'd never have gotten involved with him in the first place (okay, so that was a total lie, but this hadn't exactly been the date she'd had in mind).

Though to be fair, Dipper Pines felt far removed from the dorky twelve year old she'd first met him as. Five years on, he'd turned into a pretty well-rounded person that she'd been able to count as a friend for a good portion of the time she'd known him. She couldn't really remember when it was that they'd officially become friends, but she was glad it had happened.

His eyes were blown wide, his pupils swallowing up the brown of his irises, and she didn't have a single clue as to how the hell his old pine tree trucker cap was managing to stay on his head.

Dipper flung himself over a fallen tree blocking their path, propelling himself across with a sturdy hand against the trunk, feet hitting the ground on the other side.

It unnerved her how apparent it was that he'd obviously done this before.

Good choice, Northwest. Pick the guy that thinks death is the next great adventure. Well. Done.

She optioned to slide beneath the gap of the tree, and Dipper grabbed her hands with his totally sweaty gross ones to pull her upright, before speeding off again.

"C'mon, Paz!" He hollered as she made a break for it when she heard the crash and growl behind them. It rumbled the ground beneath her, and she barely managed to keep her balance. "Survival lies beyond the horizon!"

"Shut up, you asshole!" She shrieked, elbowing past him as she raced through the woods in the direction of the Shack like a bat out of hell. She heard a soft grunt behind her, but not even a moment later he has fallen into a run beside her. How the hell was he not out of breath?! She felt like her lungs were splitting open inside of her throat!

"What," she began through wheezy breathes. "Is- that-" She stumbled, then regained her balance. "Thing anyway?"

"It's a Sattabear."

"A what?"

"It'll eat your face!" He supplied.

"SO WHY DID YOU THINK POKING IT IN THE EYE WOULD BE A GOOD IDEA!?"

"Because I'm a seventeen year old teenaged boy that's allowed to impress his girlfriend?"

She would have thought it was sweet had she not wanted to slap him.

"Pines, do I look impressed?" She wiped sweat from her forehead, blinking against the blurry surroundings. "Argh! You are the absolute worst!"

A guilty grin grew on his face. "I may have judged the situation I was in a little too early."

A little?!

She really wanted to smack him, but the smile on his face was doing nothing to let that thought get any traction.

He was just so cute and ugh screw him for being able to play with me like this!

Stupid shithead. Asshole. Argh!

"Hey, as soon as we get back into the Shack wards it'll go away and you'll be thanking me for the best work-out you've had in years!"

"If we- don't die," she could barely speak through raggedness of her heart rate. "Before we get there!"

"Well yes, of course," Dipper agreed.

Fuming, she ran as fast as her hammering heart (which may or may not have only been from the fact that she was probably about to be eaten alive and certainly had nothing to do with the floppy haired loser running next to her) would let her. Her legs were becoming puddles of jelly under her, but she could see the tree line up ahead. A newfound energy pumped in her blood as she sped up to safety. Dipper chortled behind her, a shit eating grin plastered on his face as she slammed her body into the Shack door, sliding down it breathlessly.

The creature - a huge black mass of shadows with glowing red eyes stopped at the edge of the trees, growling ferociously at them. In the safety of the wards, Pacifica felt protected enough to flip it off. "That's right, mother fucker, you're not getting this fine piece of ass!"

The Sattabear turned, slashing a hulking clawed foot into a tree before hulking back through the woods the way it had come.

Thank god.

Pacifica buried her face in her knees and let out a loud huff. Dipper slid down the wall to sit beside her, nudging her lightly. She didn't move her head from the studious study of her shoes she was making. The expensive shoes weren't the same fluorescent pink they'd been when she'd started off the day. Instead, they were clogged with mud and dirt.

She felt filthy.

"Hey, Paz."

"Shut up, Dipper."

He fell silent, thankfully, and she finally took a peek at his face. The smile was gone, a thin line of a frown in its place. His arms were wrapped around his legs, and he was toeing the wooden planks of the decking with his own muddy shoe. For a long time the silence stretched out, before he finally sighed, resting his head against the door.

"I'm sorry, Pacifica…sometimes I forget that you aren't as used to this as I am."

"Go figure," she snapped.

He fell silent again, looking away from her back towards the woods. God, he looked so pitiful – like a kicked puppy. She sighed to herself. Maybe she was being too harsh on him – if they were going to be together, they had to get involved with each other's interests, right?

Right.

Turning her body to face him, she placed a hand on his arm, fingers curling around his bicep. Dipper looked at her from the corners of his eyes, looking glum.
"But…" Her grip tightened. "But I will get used to it. Eventually. I'll be an even better adventurer than you are – because, you know, I'm better than you at everything."

Dipper snorted at that. "Cute," he said dryly. "But I like a challenge." His eyes widened as she leaned in close to him, a light blush spreading across his face.

Only when he started to lean in did she pull back. His expression faltered into one of exasperation as she stood.

"Oh believe me, I know," she said as she flicked her hair over her shoulder, a smirk toying at her lips.

"Hey, w-wait, that isn't fair - y-you can't do that!"

"Text me, kay?" She replied before turning and walking down the steps, hearing him groan with irritation.

Sauntering off, she jumped on the hot pink motorcycle her parents had bought her for her birthday, starting the engine. She lifted her head to look at Dipper, who was staring at her from where he sat, not having moved. She waved at him, and he lifted his hand to wave shyly back. The only word she could think of to describe it was mush.

Sometimes it felt like she saw two sides of Dipper; one being this crazy adventure-seeking adult, someone so embodied with confidence that she couldn't help the envy that crawled up her spine, and then this shy, anxious kid who gave too much and received too little.

She wondered sometimes who the real Dipper was, or if maybe that confidence was something only she got to see.

Kind of like how she never showed how vulnerable she felt to anybody else but him.

Pulling on the helmet and kicking the stand up, she sped off down the road, the wheels of her motorcycle kicking up dust behind her. Only when she was very far away from the Shack did she allow the smile to bloom across her face.

Damn him.

"She's so totally in love with you," Mabel said when Dipper came inside the house. She was leaning against the window, and he could see the imprint her breath and makeup had left on the glass.

"Were you watching us?"

She nodded vigorously, face serious. "Yes sir, yes I was. And if that isn't love, then I'm going to FORCE it." She smashed her fist into her hand, grinning maniacally.

"Please don't," Dipper cringed. "Please, please don't."

Mabel flopped down on Grunkle Stan's old chair, stretching out on it. "So. Tell me everything."

Dipper could feel the blush slowly spreading across his face, reaching behind his head to rub his neck. He squeezed onto the seat next to Mabel. There wasn't nearly as much room for the both of them anymore, but they still made it work.

"Heck, I don't even know what I was thinking…" he began awkwardly.

"Oh no. Dipper, you didn't," she sounded mortified.

"…I did," he griped.

Mabel was silent for a moment, then threw her head back and started to scream with laughter.

"Mabel-" he tried, but she just gave him a hard whack against the arm to shut him up, her feet stamping against the ground like she was doing some bizarre form of tap dance. Or trying to create an earthquake.

"Mabel-"

"Dipper, she's a total priss! No wonder she looked like she was going to claw out your eyes – you don't take someone like her out monster hunting!" She wiped tears from her eyes, still giggling.

"Hey, that's not fair! She said she'd try!" He argued back.

Mabel's laughter abruptly cut off, and she looked surprised, hand dropping from her face. A kind smile appeared in place of her shock. "Wow, Dipper. She must really like you." Her voice was gentle and warm.

She was happy for him, and that alone made him feel twice as reassured about his relationship choices. "You think?"

"Yeah. I mean, I'm no expert on Pacifica, but she wouldn't put up with that for just anyone."

Wow. Wow. He hadn't thought about it that way.

"What's gonna happen when we go back to school?" They only had a couple of weeks left in Gravity Falls, and Dipper really didn't want to leave. Not now – not so soon in his and Paz's relationship. The rational part of him said that when they came back next summer, they'd just pick up their relationship where they'd left it.

The not so rational side said, WHAT THE FUCK ARE YOU THINKING YOU'RE GOING TO FUCK THIS UP.

He tried to ignore that side, to varying lengths of success.

"You're gonna text and call and skype all the time, that's what, nitwit. Make sure she knows you haven't forgotten about her when you're in the middle of midterms and finals – and that this isn't just a 'summer' fling."

"And you're sure this isn't what this is for her?" That's what he'd expected anyway – they'd only been going out for the least two weeks, and while it had been fun, he'd always had this niggling little feeling that that was all this was to her; fun.

"God, Dipper, what'd I just say?"

"…that she wouldn't put up with that for just anyone."

"That's right!" Mabel jumped up off the seat, shoving Dipper as she did. She rubbed her hands together evilly, a feral grin stretching over her face. "Now; let's discuss safety."

"Oh my god."

First fic done! Dipifica is actually my favourite pairing, so I'm kind of surprised I never wrote anything on them sooner! Oh well, I have now! Send me your headcannons and ideas, and Ill be sure to write them up!

Thanks for reading and reviewing!