LQ --
Karen is right. NOBODY need to stay in an abusive relationship.
There are organizations in nearly every city that will offer you a place to stay, safety and security, and help getting back on your feet. These are good organizations with caring people who know what its like. They have helped thousands of people just like you. They will not judge you and they will not let you get hurt.
If you cannot find such a place, one of us can help you find a place if you tell us where you are located.
You are not worthless. You are just in a difficult situation. But you can turn your life around and make it better.
Take the first step.
Best wishes,
Medved