Frenemy — that’s the “it” word given to young starlets who act like best buddies one minute and stab each other in the back the next.

Know someone like that? Keep her at a distance, recommends attorney and mediator Laurie Puhn, but don’t sever all ties. “You know the saying ‘Keep your friends close and your enemies closer’?” asks Puhn. “Sometimes there’s value in knowing what your enemies are up to.” By keeping her just close enough, you can try to limit the damage she does. But be warned: “A frenemy will want to leech on when you have information or a group of friends she wants to join” and will drop you the moment she gets what she wants, says Puhn. (But at least you don’t have to worry about the paparazzi.)