Unfortunately, it'll only get worse.  It's all down to her own insecurity.  Instead of addressing the source of it, she'll just use more and more bullshit to mask it.  And whatever you say won't make a bloody difference.  Since change and self-improvement would be painful and require effort, she won't do it.    God, I can remember being a thirteen year old girl, listening to my ex-best friend rant about how all the boys in our grade were just afraid of her and couldn't handle her and thinking to myself, "...no.  They don't like you because you're fat as hell and annoying as fuck.  And god damn it, I don't like you any more either."