Should i stay or go? Not sure what to do?

my housemate is ocd, has depression and has recently been diagnosed with borderline personality disorder. i am 19 years old and she is 20 and in the past 2 weeks she has had about 5 episodes. starting with the first one she thought that people were talking **** about her and she ended up trashing the house by pulling things out of cuboards and upended the kitchen bin all over the floor then took pills to try and kill herself. was in hospital for a few days and during that time 3 other people that were living with us all moved out because they thought she was doing it for attention. since then she has had another four episodes. one being she made our friend drive us to one of the peoples work so she could bash one of the people that moved out. i ended up texting her mother and she came and talked her into going home. then the other night her ex boyfriend and her friend bashed her because she saw them and thought it would be funny to mouth off to the guys that she knows are both heavy drug users. the night after she wanted to go see this guy 3 hours away that she has made up in her head, even made a facebook page for him and her mother physically restrained her and the police were called and rebekah didnt heed a word the police told her to do. then last night she accused a mutual friend of talking **** about her behind her back to one of the other girls that moved out of our house. she got the idea because she went onto our friends facebook and read her inbox and sent messages. i have seen these messages myself and i know that she has made up that our friend was talking about her but she fully believes it. and has threatened our friend. I love this girl a lot and i care for her but i just don't think I can deal with it anymore. i am constantly in the middle. i'm sorry for the novel of a post but please give me advice on what to do. i can't handle the stress anymore should i move out? or should i stay and keep putting myself through the stress if it will help her?