For me, "drawing the line" had nothing to do with him or any certain number of relapses. My line was internal. I had enough. My XAH got sober before I divorced him, and as far as I know, has not relapsed since (approx. 5 years). But, our marriage was over long before he decided to quit. It just took me a while to realize that. I guess maybe that means I'm not compassionate by some of your standards, but what others think of me is none of my business. My decision was based on self preservation, regardless of his sobriety or lack of, relapses or lack of.
L