I just wanted to say that it may be a sign of a mental illness and she may need help. I have been like that with my boyfriend a while ago and it was really tough (I am still struggling with many things), I did understand that I’ve had a problem and I am finally going to see a doctor about my issues in a couple of weeks. My point is, it is absolutely your choice to leave her if you wanted to and there’s nothing wrong with that, but I just wanted to say that it’s not always helpless cases and there may be some underlying reasons to these problems. I do think that people in these situations can be helped.
I am very thankful that my boyfriend stayed with me through it, but of course everyone has different boundaries and like I said, it’s your choice whether you want to continue this relationship or not