What would you do if you found yourself living in this situation? (Details inside)

I’m house-sharing with a friend from Uni and it has become clear that this person is struggling with various problems, including addiction and obsessive compulsive behaviours.
I’ve discussed the issues with her and have been as supportive as I possibly can but I’ve found it’s at the cost of my own health. I have become quite unhappy and having a history of depression, among other mental health issues, I feel it is a very negative environment to be in.
I want to be supportive, without getting the backlash of the moods, etc.
I am considering moving out but am concerned that this will be hurtful as we are close so I will have to be honest about why I want to leave. As she’s struggling personally, I don’t want to make things harder for her, but at the same time, I want to be able to come home in the evening and relax without the negative vibes.
What would you do?
Would you stay or go?