Neighboorhood Friend Problem?

Well, to start last year there was this girl named Camilla, and we used to be best friends, but now she hates me, and I have no idea why. I always followed to what she said.....I guess she just got bored. Then she grabbed another group of friends and they began saying mean and hurtful things about me and I never said anything to them. Now, Camilla is getting my best friend Leomar, on her side. Now, he isn't my friend anymore. I only have 2 friends left and they are trying to suck them into Camilla side and I have told her, Camila is trying to suck her into her plan. My last standing friend is always by my side but I am so scared and I don't know what to do. Please help me......