How to get a friend back?

Don't stoop down to her level! I had the same problem! I was in a group of three best friends. One of them i'm practially sisters with still, but the other ditched us for people who were 'better'. If i were you, i would ignore it! She's obviously not good enough or mature enough for you! If she has a problem with something you did, then she should address it to your face. Plus, if it's over a guy, that's really stupid of her...guys aren't worth it! Hope things get better!