Disclaimer: I do not, in any way, shape or form own Grey's Anatomy

Okay, I am really sorry for the super long wait for this, but with the holidays… it's been busy. Anyway, I, personally am getting bored of this fic, its time to move on, so I'm gonna try and speed it up, because its almost done anyways, so look forward to the end of this fic…

"Addison?" Mark called as he opened the door to his hotel room.

He had just finished going on his and Derek's 'mission' that had ended as quickly as it had started. They had got there too late; Meredith's mom had left Meredith to finish the meal by herself, so that she could catch her flight. Derek had had some suspicions of Ellis Grey being Meredith's mom, but Mark had convinced him otherwise. Because really, if you were a med student who had Ellis Grey for a mom, don't you think you might flaunt it rather than hide it?

As soon as they had left the restaurant, Derek had gotten a call from Meredith, telling him that her mom left early to catch her flight, and inviting him to help her finish the dinner.

And just like that Mark had been ditched, though he really didn't care, the whole time he'd been thinking about Addison and how he was going to make this up to her.

Although his room was the first place he looked, he didn't expect her to be lying on his bed, flipping through channels on the television. Yet, there she was.

She looked up at the call of her name, with a broken look on her face.

"Addison, I am so sorry" Mark said as he made his way to the bed.

"Mark?" Addison asked, her voice cracking

"Yeah?" he responded hesitantly

"Do you think it's something meaningless?" she asked

"Addie, you know that what me and you have would never-" Mark began, but was cut off

"Not us, them, Derek and that Meribelle girl, do you think that he's just using her to replace me? Like as revenge because I broke up with him?"

Mark wasn't about to correct her in a time like this, but this really wasn't the conversation he'd been hoping for, "Well maybe," Mark knew the answer she wanted to hear, and to any other women, he would have given her that answer, but this was Addison, the woman that he was forced to love only as a friend, even though he had always wanted more, he couldn't lie to her. "But, he seems happy, you know?" he sat down next to her and held her hand, as she processed the thought.

"Damn it." She whispered under her breath, a few tears escaped from her blues eyes and rolled down her cheek, leaving a hint of mascara behind them. She leaned into Mark, and he pulled her close, as she cried on his shoulder. They stayed like that for a few minutes, until she finally sat back up

"I'll be okay." She said, with a laugh, as she wiped the tears out of her eyes.

"Addison, I need to know something before this thing between you and I starts getting serious, do you still love Derek?" Mark's voice sounded unusually scared and insecure. Addison sat and stared at him in disbelief

"Seriously?" she asked, "Mark, of course I still love him, we ended a four year relationship less than two weeks ago." She quickly got off the bed and raised her voice, "Mark how many times have you said 'I love you' to someone, and actually meant it?" Mark stayed silent, "that's what I thought. Mark, Derek asked me to marry him, and I wanted so much to say yes. But I couldn't. And it was because of that stupid, stupid drunken night with you."

"Stupid, that night was stupid to you?" Mark yelled back as he stood up

"Of course it was, and it would have never happened had I been sober."

"Addison, you wanted that night just as much as I did. When I went to the bar, you were already drunk and telling the bartender how your boyfriend was 'too distant', and for the first night off in a long time, he had gone to his parents house for the weekend, without you." Mark challenged

"Yeah, he was there getting his grandmothers ring!"

"But, no one knew that. Addison, if I hadn't come and kept you company at that bar, who knows who you would've taken home."

"Are you implying something Mark?" Addison asked, pretty sure that he had just implied that she was a whore, "Lets not forget, who in this room has never been in a relationship longer than a month."

"Addi, all I was saying was that you were very drunk. I was too-" Mark softened his voice, but Addison wasn't hearing him

"Don't you 'Addi' me."

"Addison. This thing between you and me was going to happen anyways. You're telling me that I have never felt love, when you don't know how I've felt for four years. Four years, I had to forget my feelings for you existed. And on top of that I had to watch you fall in love with my best friend. Addison, I love-"

"Don't say it Mark" Addison pleaded

"But I do"

"No, you can't."

"Why not?"

"Because I am in love with Derek, and me and him are going to get back together, and if you say it," Addison paused to clear her throat, "if you say, it's just going to be harder for you." She grabbed her sweater that was draped over a chair and walked toward the door.

"Addison, Derek and Meredith are happy together, why ruin it?" Mark explained, Addison's brow furrowed as she and turned the doorknob,

"Who's Meredith?" Addison asked, Mark let out a frustrated sigh, hoping that she wasn't serious

"Addison, we could be happy"

"I'm sorry Mark, but we can't." she gave him a sympathetic smile and opened the door

"No, you broke his heart when you said no, he won't take you back." Mark was beginning to get flustered, this wasn't how it was supposed to happen. She wasn't supposed to break up with him.

"I have to try." She turned around and stepped out of the room. She turned back to him, and smiled a reassuring smile, "Goodbye Mark." She said, turning around and closing the door behind her.

Mark stood there going over and over it in his head, what had just happened?

…

After dinner Derek and Meredith had gone back to her room, and he helped her pack, though he was not much of a help,

"What about the clothes you're wearing now?" he asked from his place near the suitcase, "don't you want to pack those too?" a grin found its way onto his lips and there was a playful sparkle in his eyes.

"That's an idea, but then, what am I supposed to wear when I go to your apartment?" Meredith asked, tapping her finger against her chin, pretending to ponder that fact, "Because if I pack these clothes," she looked down at the plain white t-shirt and jeans she had changed into after dinner, "then I would be naked."

"I have no problem with that." Derek said, walking over to her, and beginning to kiss her neck

"I think that the nice people of New York might when I'm walking down the streets." She said with a giggle as she stepped away from Derek. "Besides," she intertwined her fingers with his, and began to swing her arm, "we'll have plenty of time for that when we get to your place." She let go of his hand and went to zip up her suitcase

"Fine" Derek said, pouting, he took the suitcase from her and watched as she raced around looking for anything she might've forgotten. A loving sigh escaped from his lips as he heard her in the bathroom, opening cabinets and drawers. He had only known Meredith for a week, and when he thought about it, it was crazy, only knowing his girlfriend for a week. But he knew that it was okay, it was okay because it was Meredith. He may have only known her for a week, but he felt like she understood him, almost like she had known him forever. He couldn't explain how he felt about Meredith, it wasn't love, not yet, but there was a possibility that maybe it could be. But something in his mind was stopping himself from knowing exactly how he felt about Meredith. Addison. Addison was stopping him, he still loved Addison. God did he love Addison. He knew that being with Meredith was just for a summer, they both knew that. And that made his heart ache. But it also made it leap, and he felt bad for that, because it gave him a shot with Addison in the fall.

"Okay, I'm all ready!" Meredith said, interrupting Derek's thoughts

"Great." He said, as he opened the door for her, and followed her out.

Okay, so Mark loves Addison, but Addi loves Derek (natch)

As for Derek, he a tad bit on the confused side. He still loves Addison, after all, they were together for four years, and he (obviously) wanted to spend the rest of his life with her. And if she came running back, and said, "Let's get married" he'd agree (after a nice long chat, of course). But then there's Meredith. And this isn't the Meredith we all know and love. This is the Meredith we all know and love, as a 21-year-old. And, we all know that when Meredith was 21-year-old, she was not looking for a relationship. She just wants to have fun. So they both know that this is just a summer thing. But that doesn't stop him from still believing that someday he might love Meredith. But he has a job, and she's still a student. They live in two different worlds.

And, if you didn't catch, Meredith is coming to stay with Derek for the rest of her vacation (and let's pretend that staying with someone you've known for a week, isn't as creepy as it actually is)

So that's that. Hopefully there will be an other update soon-ish… and just for you to know, there will probably be about 2 more chapters plus a very short epilogue, that (I'm warning you know) will leave you to conclude your own theories…

So stay tuned…