I find my "friend" very annoying!!?!?! BST answer 10pts!?

ok my "friend" is really annoying. We're both girls. First of all my other real friend doesn't like her either. that one "friend" is outgoing, annoying! she ALWAYS think that EVERY guy like her! ugh and she dates ANYBODY! and her current bf they don't even talk often! like at the skool dance they weren't even next to each other! and she thinks really highly of herself, and it gets so annoying! also she flirts with the guys i like! and that like me! oh, and she know's it! So i need some help, what do i do??? please help me