dont be her friend anymore. my "friend" did the same thing to me sort of but she wasnt completely the reason me and my girlfriend broke up. she actually went up to her and said "i can make you two broke up whenever i want" i mean really are you a child was all i could say to her.
i'm really sorry that your boyfriend broke up with you. But obviously he doesn't deserve you if he is going to ditch you for another girl. He's not worth it nor is he a good bf. Maybe you should confront your friend about it, calmly. Keep in mind that your friend didnt force him into breaking up with you. He's his own person and he does what he wants. They'll be others. Good luck!
Well, if you let her interfere, that's on you. If he let her interfere, that's on him also. She obviously wasn't your friend. You could talk seriously with your ex. If there is no going back maybe you can go forward. Don't make excuses or blame it on her. Just explain calmly that you made a terrible mistake letting her interfere, hurting the relationship and you ask forgiveness. Good luck. Blessed Be.
She didn't ruin 'everything' .. in fact she helped to clarify some things. You should be grateful to see her true colours (so to speak), and realize that she is any thing BUT your friend .. If your boyfriend has fallen victim to her 'interference' .. perhaps he just doesn't care enough to trust you if he sides with her and not you.