Honour your inner voice here.
You are telling you that you do not want to be with him.
You posted this thread and told us everything that you already know and everything you already need to know.
What practical steps do you need to take to get out from under his roof?
Others have been through it. I left with two kids so while some will criticise you for having had one child out of marriage (and no protection) I am going to say to you that all is not lost.
You are a mother and I'm sure you wouldn't regret that! So that's great. But honestly, do not even think about making the next stage of your life harder without the protection of an equal partner (marriage).
But even if he proposed to you to stop you leaving, you could still say, nah, actually you deserve to be valued as well as married. Both.
The first few years after I left my x were hard but eventually I got some maintenance, eventually I got a part time job, in time I got a full-time job, then I got a better full time job, I like it, my wages go up. I have my own secure place. All of my labour in terms of work, income, time, it's all for my benefit and not for the benefit of a stingy man who wanted to plunder my time like it was worth less than his time.