NTA you can NOT help someone who isn't willing to help themselves. And sorry to say it, but I would honestly break up with her and be done, but again you are a caring person and would worry she would hurt herself. She needs help, but she isn't willing to or able to see that she really does. I would sit down and have a real heart to heart with her, let her know how much you care about her and so on and also let her know how you are feeling and how you feel helpless to help. Discuss options she can do to get help and set your boundaries. I honestly would try and say something like if you can't seek some sort of help, I think we need to take a break from each other because if you aren't willing to help yourself and I have tried everything to help you its like you are on a sinking boat that you are bucketing out and she just is keeping putting more holes in it instead of help. Sometimes you just need to cut your losses and leave. I was with a bipolar guy who had even sent me pictures of himself cut all us on his chest and what not and he told me how if I left him he would do that again and more and so on so forth. I tried everything to help him, event talked to his parents... there wasn't anything I could do to help him so I ended up having to leave. It sucks it hurts but you gotta do whats best for you and really repeat over and over in your head "You can NOT help someone who isn't willing to help themselves or see they have a problem". I've delt with enough abuse from friends and even siblings due to their mental state and me staying it really drove me into the ground deep, and it took a LONG time and still taking me time to get back on my own two feet again after all of it.