Writing to us here at PC was your first step back to health. I don’t think you are in love with this man, at least not anymore. I think you’ve built your life and your idea of a relationship around him and it scares you to cut loose. Of course it does. He’s been your only partner. You have a son to raise. It’s hard to think about doing that on your own. Eventually you are going to want to try again to find love. That’s a daunting prospect as well.
But please read your first two sentences. Why on earth would you want to be with someone who treats you like this? Why would you want to raise your son to think this is the way a man treats a woman he loves? You deserve better. Your son deserves better.
The way you cope is by looking forward instead of back. You need to see a lawyer to make sure you know your rights in terms of child support. You need to develop or make friendships so that you have people to hang out with and so that you have some support during the difficult transition time ahead. And you need to focus on having enough income to take care of yourself and your boy. That may mean more schooling or looking for a better job. You may also need to see a therapist to give you some needed emotional support and some practical advice.
Once you get occupied with building a new life, it will be easier to let go of the old one.
I wish you well.