Sounds like you really "Love" her. I admire you for not giving up

. She does need help. Possibly your the first person who has the interest and patience to try to get her help?
Is there anyway you could find a therapist or pdoc for her to see? Maybe go with her for her first appt?
I'm bipolar, ptsd, dissociative disorder, panic dis ect.. My therapist and pdoc have discussions about me. I've signed all the forms so that everyone can work together as team. Sometimes when things get bad my hubby will talk with either of them. He tells them things I forget or am not aware of.
I think your aware if you try to work this out, it will be difficult on you. Sounds like you have patience and you want to learn how to help her. Welcome and we are here for you!