I'm going to leave my suicidal ex girlfriend to live with a bunch of strangers
Why would you want to do that to your girlfriend?
I can't deal with her suicidal ideation anymore.
I know it may be hard for you right now, but you should try everything you can to be there for her during her time of need.
But I'm at my wits' end with her.
If you find that you cannot take care of this on your own, then maybe you should get family or other close friends involved. I think this would be beneficial for her to show that people really care for her.