I want to be a perfect best friend...?

My friend Amy is such a dork at school...she kinda started out that way, but when she hangs out with me, no one bothers her. But when i don't happen to be around, she hangs out with the wrong group o people, and that could harm her future. These people try to get her detention, make her cuss(when i know she Hates it), and she only does this because she thinks that they make her cool... You know how on tv and around at school, you see girls that never leave each others sides? I want that to happen..i just want the other group to leave her alone! GGrrrrrrrrrrrrrr!