I have personal experience with this. It literally took my husband coming at me with a loaded shotgun for me to get the picture that well, I should divorce this guy. He only hit me once or twice but the emotional abuse was worse than a split lip and a drunken head-butt. The adultery didn't come until after we were already separated and that sort of sealed the deal. This was all an answer to my prayer for a way out. If I would have stayed or went with him the night he came for me with a loaded gun, I may not be typing this. Someone said every time the cycle starts again, it always gets worse... it always did in my experience.
Don't feel afraid that God will be upset with you for divorcing, he won't be, he doesn't want you to stay in an abusive relationship just for the sake of marriage, our God doesn't work like that. Your main concern should be keeping yourself and your child safe. What ever it takes. I had no clue there was a woman's shelter 9 miles from my house, they helped me a lot, they even helped me with a lawyer that did everything for free because I was abused. I had a safe place, legal support, restraining order, a lawyer, and I didn't have to pay a dime, which was good because I was broke. I went through the divorce process but I became a widow one month before it was finalized; he overdosed.
I went through hell, but my son and I are alive and safe.
I will pray for you and if you need to talk to anyone, feel free to IM me on here.