Do you let go and move on? Who the fk are you trying to kid?
Just learn to shut up and take him as the part-time baby maker he is to you. You need too much help to be able to just leave and stay gone.
You might consider having your tubes tied if you're going to be supplementing him while you're "off" though. Enough is enough.
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As for my advise that if you are serious about feeling better about yourself and your lot.
Get yourself to your doctor and tell him you need help with your depression and your lack of self esteem and that you are being abused and have been by a man off and on for 15 years and can he suggest a therapist that you can afford or a social service that can help you to get over your addiction to this dysfunctional addiction to this man.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion