Hello Joey: Thank you for bringing your concern here to PC. I noticed this is your first post. So... welcome to Psych Central.

I'm sorry I don't think I would know what to tell you about all of this. It sounds very complicated. Perhaps there will be other members, here on PC, who will have some suggestions they can offer. What occurs to me is simply that you can't control what another person does or change them. I know you wrote you love B very much. But no matter how much you may love her, you can't make her do what she needs to do to heal. She has to do that for herself. Here are links to 5 articles, from Psych Central's archives, that (hopefully) may be of some help in putting this situation into perspective:

You Can Only Change Yourself

Stop Trying to Change People Who Don't Want to Change | Happily Imperfect

How to Persuade Your Loved One to Seek Professional Help

How to Help Someone with Mental Illness Who Does Not Want Help | What is TMS?

How To Help The Addict Who Doesn't Want Help

I hope you find PC to be of benefit.