How can I get him to agree?

The father of my child is very controlling and manipulative. I just just recently got out of the relationship all together after trying to makes things better for months. I wanted him to be around, buying him recordable books, making our son's nursery baseball themed bc he is an avid fan and I thought he would like it. I've given him oodles of ultrasound pictures. I was always grabbing his hand to feel the baby kick.
No matter what problems we had, I always wanted him to have a relationship with our son and be a loving father. Unfortunately, he never seemed to share those sentiments. He never volentarily touched my belly, talked about the baby, or even bought anything for him. I have bought everything in his nursery from the crib to his burping cloths. I could ignore this and chalk it up to it not being real for him yet. However it has gotten to the point where he is using the baby against me. He tells me that since I have left him he wants nothing to do with our son and will not pay child support. He tells me that he will move back with his family and never contact us again.
This hurts me deeply, I want my son to know his father and have a good relationship with him. However, I feel this is how our life is going to be. BD using our son to control me all the time and not really caring about him.
Lately I have thought of going to a lawyer and drawing up papers severing all of his legal right to the baby. I thought it was win-win since he would have no obligation to pay child support or care from him and at the same time wouldn't be able to use him to control me. When I brought this idea to his attention he flat out refused, I assume because he realizes by doing this I could cut him and his abusive ways out of mine and our sons life forever.
I am at the end of my rope, I feel very helpless. Does anyone have any advice that could help me? I would greatly appreciate it.

You can't terminate his parental rights without cause....him touching your belly and not buying recordable books is NOT cause.

Sounds like ur gunna have to get used to the idea of being a single mom with a smurffy BD. Welcome to the club. Good luck to you.

I understand that. Him saying that because I have left him he want nothing to do with his son is what bothers me.

His parental rights couldn't be ended anyways... and since he seems to think that he chooses whether or not he pays child support I'd file and show him that it's not his choice at all. If he wants to be around the baby, he'll be around.

Quoting BαƚMαɳ:" Sounds like ur gunna have to get used to the idea of being a single mom with a smurffy BD. Welcome to the club. Good luck to you."

  

Quoting Katherine Osborne:" I understand that. Him saying that because I have left him he want nothing to do with his son is what bothers me."

Men are smurfs. If he is seriously as childish and immature as you make him sound, ur in for worse than that. Time to grow a thicker skin to the bullsmurf.

Quoting BαƚMαɳ:" Men are smurfs. If he is seriously as childish and immature as you make him sound, ur in for worse than that. Time to grow a thicker skin to the bullsmurf."

Not all men are smurfs.

Just because he is a smurffy boyfriend doesn't mean he'll be a smurffy father.