My boyfriend just broke up with me, although I made the mistake, I need to know how to win him back

I don't know

Did you answer your own question? I'm sure that wasn't meant to be funny but I laughed.

Anyway, you don't really say why he broke up so the only thing I would do at this point is pull back and let him cool down. Maybe in a couple days or a week he'll realize he over reacted and want you back.