Of course you have choices. The less you have now, the less you have to lose. Phone Women's Aid, phone a solicitor, call the police on him, go to a refuge, whatever it takes.
As kids we would have far preferred to live in a bedsit with a mother who chose to protect us than in a 4-bed detached house with a mother who stood by while we were all tyrannised and terrified by our father's violent moods.
By doing nothing you are effectively making a choice to put your dp before your children. One day they will understand the implications of your choice, and they won't forgive you.