I really need some advice. My teenage niece is bipolar, and has been acting very unstable lately. She's been fighting a lot with my sister, objecting to the normal rules of the house that have always been there, generally just not getting along with anyone and being unreasonable. She is threatening to run away, which has us all extremely worried. She has been trying to stay in contact with a guy that isn't good for her, and we are worried that he will influence her further. As her aunt I want to be there for both of them, is there anything I can say or do that can convince my niece that she'd be making a huge mistake in leaving? I just don't know what to do and how I can help, I'm at a total loss.