aJam, I hope my strory will give you hope and help you realise that however scary the future may look, it's infinitely better than staying with an abusive man.
I left my abusive partner when our twins were 4 months old. He put his hands around my throat and threatened to kill me and I walked out to a neighbour's house, leaving the twins in their cots. Then I called the police and had the twins picked up and brought to me.
My X would not let me back in the house for cots, clothes, steriliser, bottles, nothing. I had nowhere to go and thought I was looking at a refuge, as the house we lived in was rented and only his name was on the tenancy agreement. Our neighbour turned out to be a saint in disguise, and I lived with her for 5 months before I got a place of my own.
My point is this: If I can leave with two children in those circumstances, and 2 1/2 years on be happier than I ever believed possible, SO CAN YOU!!!!!
The strange thing is, despite the trauma of that day and the uncertainty of what was going to happen to me and my CD, I instantly felt better than I had done in years leading up to that day. The minute I left I rediscovered my self-respect and control over my own destiny, and everything pretty much fell in place following that.
I won't pretend it was easy to begin with, but you know what? Whatever trials I faced following the split were nothing compared to the helplessness, misery and frustration I felt when I was living with my x.
Good luck to you. I hope you find the strength to just 'do it'. I promise you that it is a decision you won't regret, either for yourself or your DC.