She said she saw how much I was trying and how much I've improved things about myself...but I guess it wasn't enough.
I hope you weren't doing it just for her. Regardless of how your M turns out, you are still a better YOU because of the work that you have done.
Do you have DR? Check out page 230 and understand that she is addicted. Even MWD gives the permission to put your foot down when all else fails. Check it out and see what you think. Only you can decide when the time to "give up" is there.