It sounds like people have been letting her do whatever she wants, and then just kickin her out instead of making her follow the rules. I hope she obeys the rules in your house. If she is going to be stuck with you for awhile maybe you can get some help from the government to pay for her so you don't have to give her money for things all the time and maybe for a bigger apartment/house? I don't know really how to help I am sorry. Is she old enough to understand depression, etc? Maybe you could talk to her about it and tell her how you've been stressed out and ask if she can give you some space.. or maybe you could become somewhat friends? go on a walk together? if she likes you like your bf says. It seems like he is not being very supportive of you and like you've been supportive of him and his family but its not your responsibility that his family is messed up. I don't know what else to really say.. I am sorry you are in this situation.