First I want you to know how much I admire your courage for pulling yourself together and making it into graduate school. MSW programs are not easy to get into and the fact that you want to use your evolution to help others is to be celebrated. People who have recovered from life’s hurts almost always make good therapists.
Let’s not, as the ’60s slang phrase goes, push the river. So far you have been systematically evolving and resilient in making changes in your life. You are having more of what you want and less of what you don’t want. This means your life is moving in the right direction. Someone who self-sabotages is typically ambivalent about their circumstance – so if this is your concern, keep talking about what you want and don’t want in a relationship. Clarity is the antidote for staying in an ambivalent situation. If you keep moving toward clarity the risk of sabotage goes down.
I am assuming you are already in therapy, but if not I would encourage you to use the services at the graduate school you are attending. This will help with the process of clarifying.