Relationship, started on basis of blackmailing and has an element of revenge (“He keeps saying that I initially blackmailed him and that’s why he is causing all this pain to meâ€) is never going to be healthy. Better accept that it is not going to be worked out in mutually satisfying way. It is better to come out and you may have to explain this fact to him, probably he may agree to break up (otherwise, the way you forced yourself on him, you can also walk away like that, for betterment of both of you!!)