EDIT : I meant moving out, in your own solo place, without your nesting partner.

I'm considering moving out to get my own place. We live in a big apartment with my partner and her partner who owns the place. My partner's mental health has proved to be quite a toll on me, and I have little to no room to breathe.

If you want context, here it is :
I've been the nurse for over a year due to an injury which sustained a disability, a suicide attempt, an emergency procedure for a discal hernia, caring for her, giving her meds, handling household duties, admin work (she has ADHD), carinf four our four cats and three dogs but... It's just not working. She does go to therapy regularly to deal with her PTSD, depression and general anxiety, but she drinks every day, smokes an insane amount of cigarettes, lives on our EU State help, and has contracted over 8k debt with her friends. She also owes me around 5k. She has made small progress, but I'm financially supporting our entire relationship alone. I don't feel helped. I can't budget clearly because she always runs out of money. I need breathing room.

How did it go for you ? Did it help with the relationship ? How did your mental health do ?