What if my friend is really my enemy?

I know this one girl at school. She seemed really nice when I met her (2 years ago) but now she's nice up front but stabs you as soon as you turn around. I feel like saying, 'if you got something to say, say it to my face!' but I don't, because as much...

as I want to explode at her, she's pretty and popular and can make herself cry. This equals a recipe for disaster. Bon appetit!
Anyways, as much as I want to just pop my collar and ditch her, the more you pull away, the harder she holds on. I don't want to destroy my social life just because of her. I'm stuck and I can't think of a way to just leave her little universe without screwing something up. She knows almost everything about me, so she can mess with almost everything around me. What do I do???

Don't ever, EVER let your gaurd down around her!
She's the type of girl who wants to use you to get to the top.

Stop letting her in, don't let her know any of your secrets because then she'll have something against you. Just don't let her in, and don't let your gaurd down.