Steve never understood Tony Stark.

He was a stubborn ass who didn't care for anyone, it seemed, but himself. He claimed he wasn't a team player. But why was he always the one helping the others when they got into a fix? He said he was in a relationship, but Steve saw Pepper around the Tower more than Tony did. And the only words he'd heard them share were arguments.

He claimed that he hated Steve, but why did he look so lonely whenever he was around? And why was there so many very old items of Captain America merchandise around?

Tony just didn't make sense.

Especially when, one day, Tony came down to that weekly Avengers pizza dinner and movie. His eyes were bloodshot, his face slightly puffy and he had dark shadows under his eyes. He seemed quieter than usual.

About halfway through the meal, Natasha looked sternly at Tony. "Tony, what's wrong?" She asked.

"Nothing. Absolutely nothing." Tony replied, though Steve noticed his voice was a little thick and his breath afterwards was a wet-sounding wheeze.

"You're having trouble breathing." Steve stated. "Don't try lying, I used to have asthma."

Tony sighed. "I have a cold. And I always have trouble breathing."

Steve frowned, concerned, but a look from Tony convinced them all to leave the topic alone.

Tony fell asleep during movie night. It happened often with Bruce, but Tony had never fallen asleep during a team night before.

Tony was snoring quite loudly, and drooling on the sofa. Clint moved to wake him up, annoyed that How To Train Your Dragon (Clint liked children's movies, and it was his choice.) had been interrupted, but Steve shook his head. "Don't wake him." He mumbled. "He looks tired."

Steve was forced to wake Tony up, though, when he started moaning in his sleep.