Welcome, Paul.
Out of respect, I'll be pretty direct.
It is clear you are sensitive, hurt, and yet some other inner message is driving you to clamp on to this woman as though your sheer determination to sacrifice yourself will inspire her to heal herself.
It won't.
You can't "see that she gets the help she needs." You can worry and strain and eat yourself alive with pain and anxiety and track her every breath and lie in the dark feeling the emotional cold and suffer and suffer and suffer and suffer. Then you can wake up and try again. Try to persuade, cajole, understand, empathize, hold, lovelovelovelovelovelove her into loving you back.
You can throw away your precious chance at a dignified, meaningful, self-respecting life.
You can deteriorate emotionally to the point that you cannot think, only feel and strategize and grasp hopelessly for control.
There's another thing you can do that is guaranteed to break your heart and leave a mark on your life that you never can erase.
You can marry her against your own well-being. Then, later, you can get divorced.
It is a terrible trial to the spirit...and think of this, please:
Every person on this board married in the belief that it would eventually be a healthy, loving partnership...or in some way, be a fulfillment of the dream of marriage.
Marriage is not a dream and you cannot dream it into being.
Even if you marry her, you may not wind up with a marriage.
Don't do what I did...it is a kind of regret you only understand in the way that a person who smokes for many years understands consequences, after the diagnosis.
Don't kill your dream of marriage. You will, I believe, if you marry this woman...
I'm sorry. Your story just makes me want to be very very direct.
I'll understand if you're not able to hear me (I couldn't hear anyone either). But I'd love to spare you that pain. As would we all.
Very glad you're here, Paul. Keep posting. (Don't let me or anybody scare you away! Those who have the good sense to say they don't know your situation are more tactful and I should probably do that too. But I DO know your situation, even with your--and her--uniqueness.)
And read up on CoDependency, please. Start with Melody Beattie's books...
Best to you,
Hopalong