He punched me once and I left him. How is that putting him before my son?
Leaving him WAS putting your son first, and it was very brave. If you go back, that would be putting him before your son.
he loves me and does not enjoy hurting me
Really fairycakes? How do you know that, because he says so? His actions don't say it, do they?
I'm sorry I know I sound terribly patronising, I just really want to get through to you!
If I was her I would be out of there long before it got that bad.
I'm sure that's what most abused women say, before their self-esteem gets worn down more and more, before their OH puts more and more distance between them and their support circles, and before they become more and more under their abuser's control.
I know you probably want nothing more than for your relationship to be how it was at the start. But it will never be like that again. And actually in the grand scheme of things, you haven't been with him for very long. How long was it before any of the controlling behaviours started?
It might help you to reread some of your own earlier posts, to remind you of how you have felt at different times. I believe that now you are feeling lonely, sad, and lost. This means you are more vulnerable, and the anger has dissipated somewhat. Anger is a much more useful emotion than sadness.