I am sorry Flower
I would imagine that he had some sort of plan before he just walked out. I am just sorry that you are sad and worrying again.
Guess he isn't desperate enough to stick with it. At least he knows what it feels like to be clean for a while, and that will remain in the back of his mind, if he uses again, and may call to him someday... I sure hope so.
In the mean time, you need to be able to live without worry, sorrow and fear. Are you in any meetings, such as al-anon, or nar-anon?
I hope there is a happy ending to this situation, very soon. Remember, you cannot make him want to quit. It is so easy to get caught up in trying to fix things for them. I wish we could.
prayers for peace and good things for all of you.
chicory