Wow, this has been such a roller-coaster ride. I hope she gets some help where ever she is at the moment.

I hope YOU are OK there during all these ups and downs with your friend. ugh

I don't mean to sound awful but I think under the circumstances you've been dealing with the past few months, there's going to have to come a time when you lay down the line with your friend as difficult as that may be. It might save her and it might save you. There's going to have to come a time when she either gets adequate medical help or it's time to separate. You just can't keep doing this and she can't keep living like this. You're not her parent. She has parents. You're her friend and flatmate and have been terribly patient. Such a difficult situation.