I have experience with alcoholic sociopaths (my father & grandfather). They derive pleasure from hurting. The only way to avoid the hurt is to stay away from them. If you express how much you are hurt, they will try to grind the pain into you.
I would really encourage you to continue with the therapy. Maybe you can find a low-cost service? It sounds like you are miserable, and thinking of him is only adding to that misery.
The more you interact with him, the worse you are going to feel. That's why I choose to not interact with my AF.