:( My boyfriend who I really love just dumped me but he does not no why how can I find out?

If he does not know why then I doubt you can find out. Only he knows the real reason he broke up with you.

Maybe he has reasons, he just doesn't want to tell you... He probably has met someone else, but he doesn't want to hurt you by telling you that.

You should try to find out. Talk to him. Let him know you want to know the real reason no matter what that is. Be prepared for anything though. If somehow there's no real reason, then maybe your guy needs some time off, I don't know. Yet, he dumped you... Does he really love you?

If he doesn't know himself, then its not very likely that you'll find out

I agree with Kristynn, he either met someone else, or he just doesn't feel the same for you as he did and he doesn't know how to explain that to you. But the only way your ever going to be able to find out is by asking him about it.