Two things stand out to me on this:

1. I think shes a prank looking for validation. I know that oneitis almost always gets rejected and I think all she wants is validation.

What does that mean? All I know if the word "prank" is involved, it is very seldom a good thing.

2. Whenever I meet her with her friends (she has a flock of sattelite males around her, all waiting for their "chance") they laugh at me behibd my back.

How do you know this? If you're certain that they are in fact laughing at you, that should be all the affirmation one would need to stay the heck away. Otherwise, I think you might be setting yourself up for a ton of drama.