There are many ways to look at this situation...but the outcome is the same. Whether he really meant what he said on occasion (that he wanted to tell you the truth or part of it, that he really cared for you, that you weren't like his wife, that he really was abused like you want to believe, etc)....the facts are the same...this guy is really damaged and ill, and you being in his life isn't going to fix that.

I am reminded of my passion for being there for someone I love like you seem to love this guy. Love is a two way street. Also, love doesn't fix someone, they fix themselves. I have to remind myself, and maybe you should too.

Whether this guy is a sociopath isn't the issue is it really? Isn't about whether it was real? And apparently it was real to you. That is obvious. What isn't so clear is if it was real to him. And maybe it was at the time, but I doubt based on what you have shared that it changes anything at all.

This man is not a nice man. Even if you laughed and shared and loved. Sometimes people are damaged and they aren't fixable.

You can't fix him. Maybe sometimes he had feelings for you...but he is broken.

It doesn't matter if he is a sociopath or not, it doesn't make a difference. It matters what he has done. If someone whose name you think is John calls you a retard, does it make a difference if his name was Peter in reality?
A bad example, but you can probably catch my drift