I suggest starting a journal of your feelings and what happens in your relationship. Bad memories fade, but you cannot refute your own words documenting the occurrence/recurrence of certain things. I myself started a journal a couple of years ago when my EXABF's H habit consumed our relationship. I periodically look back at different entries and am struck by the fact that over several years, the problems are the same. I would say the most important thing that you can do is hold yourself accountable. If you stay with him, acknowledge that you are consciously choosing to stay with him, and you are willing to accept whatever consequences that may bring, good or bad.