I'm looking for a story that was a kink meme prompt.
Tony kept asking Steve out on dates and stuff and Steve didn't take it seriously, he ended up leaving Tony at a Gala because he thought Tony had found someone to go home with. Tony was hurt because he thought he was being stood up. Natasha wasn't too happy with Steve either.
When Tony ends up admitting his feelings for Steve I'm 90% sure Steve laughs at him.
I'm pretty sure they start dating at the end.
Sadly, this is all I remember, I hope it rings bells for someone.