How do i make friends with girls ?

First off, yes they are jealous of you thats why they are gossiping about you, sad but true. Second, I don't think I would want to be friends with people like that. But if you really want to you could just be yourself, be nice, and try to talk to one of the girls by themselves about the gossiping thing because usually when you get one alone she will change her attitude. Just be the better person and be a nice girl, the best revenge against people like that is to live happy and well.