"I deserve better. I deserve a someone who WANTS to be with me. No 'ifs, ands or buts' about it. I will not stay with someone who treats me poorly, cheats on me, or uses me to get what they want. I deserve better."
Keep saying it to yourself because it's true. it is what it is. you cannot change his mind. why would you want to be with someone who doesn't want to be with you? YOU DESERVE BETTER!!
Stop going over there. Stop talking with him. He's involving lawyers and making it messy. PROTECT YOURSELF, he's not going to do it for you. All he'll do is keep screwing you over.
Let go, or be drug.
When you are happy as an individual, you are in a better position to determine whether a partner enhances your happy life or weighs it down.