what do you do you do if you have a crush on this boy but you guys are like best friends or was!?

Question

you like him and you guys was friends but your not no more how do you tell him you like him if you're not talking?

Answer 1

First, why did you break up? It may be that he likes you too, but the stress of liking you and you not liking him drove him away.
You have already lost him. If you really want him then you had better go up to him and tell him what you really want. If what I wrote above is true, then he is trying to forget you because he likes you. If you don't act fast, it will be too late. What's the worst that could happen? He will say no and nothing would change.