After reconciling the addiction, heartbroken, dejected, resentful, and an anxious mess, I held onto my relationship for about another year. I waited for his next provable relapse, so I could point to it and make my family let me off the hook for leaving him. They wanted me to cure his addiction.
I waited and waited, sure enough, he relapsed eventually, but not after another year's worth of pain and trauma, and even then, our families blamed me for not helping him enough.
If you're waiting, use this time to shore yourself up, make sure you have an airtight plan, a good income, and the emotional resolve to call it quits and stay away from him once and for all. See a lawyer if you need to, just so you know your options.