I'm sorry you are in so much pain. Only you know what God is telling you to do. If he is abusive you need to remove yourself from the situation. Maybe divorce is not the answer BUT a LONGTERM separation until he gets a handle on HIS issues might be. Tolerating abuse is not an answer to your problem. You have to allow him to reap the natural consequences of his actions. You tolerating it may be you getting in God's way of helping him. Read the Boundary books by Henry Cloude and John Townsend.
Here is a snip of what these Christian counselors believe:
Limiting Evil
One of the other aspects of boundaries that is important is the limiting effect upon evil. Remember, because God does not control people, they are, in a certain way, free to be evil. He does not make them be good. He limits His sovereignty and control in some ways that we do not totally understand. But, even though He allows them to be evil, He limits the effects of their choices. He exercises limits on the effect that their choices will have on Him, His church, the world, etc.
He has also given us this duty, to limit the effect that evil choices that people make can have on life. One of the best examples of that is in Matthew 18:15-18. It is the role of us to take a stand and bind evil as it presents itself. Read Psalms 101 for a great description of how David thought about the things that must be bound so that the evil of others would not cling to him.
In addition, He wants us to limit the effect that the evil is having on their life as well. He wants us to restore those who get caught up, by evil. We are to put boundaries on the cancer that is destroying them and be redemptive in their lives. (Gal. 6:1)
God is about Life. He is about restoring good things. And to do that, evil things must be held in check and transformed. He has given us many tools to perform this function of the salt that seasons the earth:
Truth and Commands
Confrontation
Rebuke
Exhortation
Forgiveness
Group Intervention
Consequences
Discipline
Restoration
Limit Setting
Separation
These are some of the processes that God has told us to do that limit and restore evil. And, they work. The problem is that we do not exercise our control and responsibility to do these things in our significant relationships, the church, and the world at large. As has been the story since the garden of Eden, the mess is largely of our own making. If we would use our self-control to do these things, then we would not have the messes in various aspects of life in which we find ourselves. We have misused our freedom. But, the good news of boundaries is that you can take control back in your own areas of influence, and begin to limit evil and restore life.
Here is more on this issue:
http://www.cloudtownsend.com/Articles/simple_scoop.htm