There is absolutely nothing good that will come of you being back connected to this guy in any way, shape or form.

He does not just want to be friends. He wants to get some kind of control of you again. And you don't just want to be friends. You are subconsciously entertaining the fantasy that he may become a nice guy. He won't.

You are making this way more confusing than it needs to be. I humbly suggest that this is because you are not being real honest with yourself. I'm guessing that you have not yet gotten into another relationship. (If you had, you wouldn't be even considering this.) You are missing having a guy to relate to, so you are willing to let this guy back in to fill up the empty space. You are deluding yourself that, this time, you will be more in control. You won't be.

Cut the cord. Move on. Let him move on. Let go. You should not even be talking to this guy. You are not respecting yourself. And you are making it more likely that you will keep going into abusive relationships. That's because you have failed to make the firm decision that, "There is zero room in my life for any man who abuses me." Wise up.