Run away. Find someone new. You two aren't married and the break can be clean.
Here is the problem: if this is happening before you are married, what do you think would happen after you were married? In my own experience, and seeing it the same way in lots of other people's marriages, if there are problems before marriage they will only be amplified in marriage.
I guess my question is "why are you so dependent on this woman?" It seems to me like you have forgotten a lot of the things you learned through your first D.
Look up self-differentiation in marriage (and relationships). You sound codependent.
Get back to GAL.
Take care of you. Leave her alone to figure out her own crap.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018