Hi-
I'm not nearly as knowledgeable as others in this forum, but my take on this is that "self awareness" alone does not make a person change. He can say that he is now aware of his problems and propensities, but without work, time and lots of effort, his behavior may not change, at least not for good. You and he would have to learn how to "manage" his Nism and you would need to be open to changing your way of dealing with him. It's not just a one-sided deal that he needs to change. Do you want to put the effort in, too? Do you trust and love him enough? His sincerity to work on himself may be real, but only time will tell if he intends to truly try. It's like someone with a drinking problem saying, yes, I know I have a drinking problem, saying the words, and then heading for the liquor cabinet. What good does the self-awareness or "confession" make? It's just words.
If you are dedicated to your marriage and think that you can heal the wounds and feel this is the life you (still) want, then continue with therapy and proceed with caution. Only you can decide. But you may always wonder what would have happened if you don't give him a chance, so if you're not too overwhelmed with the idea of trying, it might be worth a shot.
Best to you.
Terry