I've been friends with this girl, and we've been friends for a long time, and now she thinks that I was the reason her, and her boyfriend broke up, when I didn't do anything, and she's made all of my other friends turn against me. I don't know what to do. Can you help me?

Just don't talk to her anymore. Drop her as a friend. If she was really your friend she would'nt blame you for something that could be her and her boyfriends fault. Just let her come to you and if she apologizes to you then well there you go. Never let a boy or girl come between friends.

The best thing to do would be have him tell her it wasn't your fault & try to talk to your other friends, and explain your side of the story. If they are your real friends they should atleats listen to your side.

Well this is typical for teen drama.
My qestion is as good as yours, why does she blame you?
I think youand your "friend" should sit down and talk about it,.
Best of luck morhanmichaela.