I need to leave my child’s father.

I need advice, and some encouragement. I know this is long, but you need to understand the situation.

I’ve been with my son’s father for 3 and a half years, my son is almost 2. His father is very very toxic, he will belittle me and make me feel like absolute shit. He’s put his hands on me, while he was drunk, a few times. He controls me, and tells me what I can and cannot do. I lost my job about 2 months ago, so I have nothing. My phone and car are in his name, so I can kiss those goodbye as well. I’m currently studying to take my GED test so I can find a good job.. but it’s like everytime I go to leave him, I don’t, it’s like I physically can’t (how it feels). He has 2 children of his own and they basically depend on me. Their mother is no count and not in the picture, and he just treats them so bad. I do everything for them, and without me they will be miserable. I don’t know what to do. It’s so hard, but I can’t deal with this much longer. Someone please help, please guide me in the right direction and give me some strength. I cannot live like this.