My tendencies to my compulsivity and obsessiveness which are traits among all those who have addictions -got the best of me.
No, not all those who have addictions cheat. He is blaming his hurtful choices and disgusting behavior on "compulsivity and obsessiveness" and you are buying it.
I am going to show you how wonderful you are... you are going to be treated so special by me that you will have no other choice but to believe in me again...
I am insulted by this person's words and don't understand why you are not also.
1. No one needs to show me how wonderful I am because I already KNOW how wonderful I am.
2. No one needs to treat me specially because I already DO that for myself.
He is telling you that, by his actions, he can control you. And it is working. You are letting him control you.
When you are through letting someone else control you, make your decisions, and run your life, you will know. Please know that when you are ready, your family, Al-Anon and SR will all be there for you.
My last bit of advice is to reiterate what has already been said: Stop talking to him and go No Contact. And go to Al-Anon.