Loveless Marriage

I was reading your thoughts about the law of least effort. Accepting people and your situation every day is a very helpful and joyful experience. My question is that I am in a loveless and emotionally abusive marriage. I have exhausted all means to try to make it work. If I am to accept people and situation then how do I handle this. Is a person suppose to stay in a relationship that is unhealthy physically and spiritually and try to accept. I am just trying to understand where we draw the line of acceptance.