I can't lose any more weight? Plateau?

Well, it might be your natural healthy weight, I am sure look great at that weight, its like perfect. I have been recovering from anorexia for a couple of months, and that is the size I am shooting for. You should not try to force your body to be a certain way if it doesn't want to be. If you are eating and exercising the right amount, then your probably just fine. Remember, guys like healthy bodies, toned, and curvy, not weak and skinny like I was.