I don't know what to do about this really annoying, mean, fake girl?

you know, people can be real bitches some times!! same thing happens to me e v e r y d a y and its like a girl who all the guys like and some days shes my friend and other days she hates me! i know she talks about me becauzmy friends tell me all the time... all you can really do is tell them to **** off and live your life