well, i am in no way a mental health professional, but do keep in mind that she does have a mental illness, which means she's probably not exactly mentally nor emotionally stable. this of course can cause her to act in many ways that she would not if she was not bipolar. it is a possibility that she harms herself for attention, but the real underlying reason is likely the mental illness thing, which is causing her to act in rash ways unlike her. i don't think it will help for you to show anger that she's doing this. i think it would be best for her to have a stay at a rehab or psych ward where they can watch her, give her therapy, and balance out some medication for her until she's stable and no longer harming herself. she seems very self destructive, which is very concerning and should be confronted immediately. so yes, she may be doing it for attention, but do remember that even if she is, it's not really her that's making these decisions, as she's being influenced by an illness. get her some professional help and try to be as understanding as possible.