Just a reassurance....no one can tell you when to leave an abusive relationship - only you can decide when you're ready...But after 20 years w/the only man I had ever loved, I was petrified of the "leap". But now I know that I did the right thing and even though I'm not ready for another relationship, I've realized that I was far lonelier and my world far smaller when I was in the marriage than I am out of it. You might want to ask yourself just how much of life he deprives you of now.
Lots of love and support