I like me better (when I'm with you) (слэш)

If you ask either of them how they got together, they'd go back to an unremarkable night filled with expensive food, rich donors, and lots of schmoozing. And, of course, the anxiety attack that started it all.
 
"Not recognizing someone was strange enough, but the longer the two men spoke with — or, more accurately at — Tony, the more convinced Steve was that the conversation was unwanted, at least on Tony’s part.
The first clue was that Tony was actively leaning away from the men he was talking to. Steve had learned firsthand that Tony was an incredibly tactile person. When he wanted to talk to you, Tony engaged completely; he’d sling his arm around your shoulders, squeeze your arm, or drag you around as he talked, walked and usually did at least two other things. Even when he argued, Tony was often immediate and in his opponent's space; Steve knew that from experience.
Right now? Tony was scanning the outskirts of the room rather than making eye contact with the men near him. If Steve had to guess, Tony was looking for the nearest exit."
 
Or, the way Steve Rogers and Tony Stark became friends and then more.