I am torn as to whether or not she and I can ever have a healthy relationship.
We can relate to that. Yes, some members here have had to deal with that dilemma. She may not ever fully recover to a reasonably normal life.
I would like to point out that her problems are due to her internal issues. On the other hand, your problems are external — or situational — issues. It doesn't excuse either of you but is something you can consider.
Whether you can manage to work things out, only time will tell. Some here have mentioned that divorce is final only if you never get back together again. That is, there is always the option to remarry if you truly believe the old issues won't recur again.