I want to leave

I've been dealing with depression ever since I had my son in 2021. My boyfriend already has 2 kids and didn't want anymore, but I got pregnant, and even tho we're still together, I've basically been doing everything on my own since day 1. I'm always mommy, and unless I throw a fit and act crazy, or I'm out of town visiting family, I don't get a break. My family lives out of state, 12 hours away, and his family has never been close or supportive. I've left multiple times and gone home with my family, only to end up coming back every time. These last few months have been extremely rough. My son is having these horrible tantrums and while I can ignore them, but my bf can't, and we end up in these screaming matches because of the tantrums. What he fails to realize tho is our son's behavior is a direct reflection of the way HE acts towards us. When we're out of state with my family, the tantrums are not as severe and not as often. But my bf refuses to listen to reason. I want to take my son and leave, but when I left last year, I ended up with this stupid judge who decided to make a temporary custody arrangement when we were really in court for a protection order. The judge ordered that I bring my son to his dad every other weekend and one night a week on the off weeks. She wouldn't even listen to me when I tried to tell her that this man has never even so much as given our son a bath, and hadn't changed a diaper in over a year. Now with everything else going on between us, he is now saying that he wants to get another DNA test done on our son. I told him he could get 40 of them done and they'll all say the same thing. But right now I honestly wish that they would come back and say something different, it would certainly make my life so much easier.