My suggestion is to re-read my first homework post. You need to DETACH and stop believing anything she says.
She is negative because that is the way her brain is wired right now. She sees everything through a negative lens right now because she is in a FOG.
Best to not worry about her and concentrate on YOU. You did not break her and can not FIX her. However you can FIX yourself. You can control your own actions and words.
