AN: Ok, so this was my first try at a Teen AU. Not the best thing ever, but it gives me all of the feelings, so I'm proud of it. Named for either the Mayday Parade song or the Red Car Wire song, take your pic.

Dean was terrified. He was quite certain he'd never been more scared in his life, and that was counting the time when he was six and John had dragged him into that haunted house and the guy in the Michael Meyers mask had snuck up behind him and he'd peed himself. That had been pretty damn scary, but this topped it without question.

Because he was about to tell John that he was in love with his best friend.

His very much Cas-shaped best friend.

He'd rather do literally anything else in the entire world, but he didn't have that option. He had to tell John, or his dad was going to be very confused when he found out his son's date to the junior prom was Cas.

He wasn't worried about how Mary would react. He was pretty sure she'd known since Dean was four and Cas's family had moved in down the street. They'd been practically inseparable since then, and Mary had always had a way of knowing things.

But he wasn't so confident about John.

His dad was a military man, after all. He expected Dean to get good grades, go to college, and take over the family business. He expected him to marry a nice girl and have 2.5 kids. How was he supposed to tell his dad that he was in love with a guy?

He took a deep breath and descended the staircase, coming into the living room where his mom and dad sat on the couch. Mary was reading a book and John had the newspaper. Dean swallowed convulsively and then cleared his throat.

"Um, Mom? Dad? I have something I need to tell you," he said, sitting in the chair opposite the couch. He rubbed his palms on his thighs nervously.

"What is it honey?" Mary asked as John folded his paper.

Dean's heart was beating too fast and he felt like he was going to simultaneously vomit and pass out. "I…" he began, but he faltered. He couldn't do this, he couldn't face John Winchester and tell him this.

But then Dean thought of Cas. He thought of the way he could call Dean on his bullshit with just a look, the way he listened when Dean talked about the technical aspects of the Impala, even though Dean knew he had no clue what any of it meant. The way that Cas looked when he was sleeping, so innocent and peaceful it should be sickening, but it wasn't. He thought of the bright smile that he only ever saw when they were alone, like Cas wanted to keep it just for Dean. The way even a short laugh could ring in Dean's ears for what felt like days. He could do this. He would do this, for Cas. Because he loves him.

"I'm in love with Cas," he said bluntly.

Mary beamed and Dean could see the unspoken "I knew it" flash in her eyes. But Dean kept his focus on John.

The older Winchester studied Dean for a moment, expression impassive before he picked his newspaper back up. "It's about damn time you figured it out. I was getting real damn tired of watching you two run circles around each other," he said, eyes skimming over something in his paper as he spoke.

Dean's jaw dropped. "You're… Not disappointed in me?" Dean asked, his voice filled with shock and relief.

John looked away from his paper, locking eyes with his oldest son. "Dean, the only thing you could ever do that would disappoint me is not marry that damn kid. Now, go upstairs and call him, I'm sure you told him you were gonna do this and I'm sure he's worried half to death by now," John said, casually going back to his paper.

Dean broke into a big grin. "I love you guys," he said before darting upstairs to call Cas.

Maybe John had a way of knowing things too.