Tony
Constantly teases you about it, but in the end he's very supportive of you

Steve
Steve would be really happy for you two and wants to help in any way he can. He also makes a personal threat to him that if he hurts you in any way he will personally kick his ass

Peter P.
Is really hurt that it wasn't him who you liked, but he's super happy for you anyway, and would sometimes try to compete for you.

Clint
Like Tony, Clint will also make fun of you for it. He wouldn't at first though, until Tony gets him in on it. Then he wouldn't stop. But in the end he's proud and happy for you

Thor
Thor ships you and your boyfriend, and tries to always make a romantic setting whenever you two are around each other.