How can i make a girl leave me and my friends alone!?!?!?

Tell her that shes a effin snitcher! That she should go find her friends of her own. And too mind of her own business. Confront her! If you wanna say it kindly talk to her in private and say that you are tired of her and cant stand her. And either your friends. And that your sorry. Basically tell her the whole truth. This will make her LEAVE! Best of Luck!