Not sure if I should continue

I have been in this relationship off and on for at least ten years. We tried three times to live together. Each time it blew up. Due to her jealousy. Which I believe is caused from falling back to alcohol. That is not my question. My question deals with how she consistently moves back in with her ex (he is the alcoholic) cause of a house they purchased together. She has consistently told me she wants to get away from him. Back in 2013 I helped her get a restraining order on him. That she canceled after we broke up. Now I know that we can't go any further until she has been independent. She knows this herself. She says she has started A&A groups and anxiety, depression groups. What questions me is she doing it to be with me or for herself? The only time she seems to start working to get out is when we are rebuilding our relationship. Am I truly helping her or hurting herself and myself along the way. I want to be with her but I don't know how much more I can handle