Good comments from those who came before me.
Will he be back, probably, will he be clean and sober, probably not. Will he make lots of promises to get back in, probably.
That's when the real test comes, what will you do? It is obvious your children are much happier when he is not in your life, no, they do not understand the love syndrom, but, his actions have disrupted theirs lives and he is still disrupting yours. The yours part, is up to you, obsessing about him only holds you down, stuck in the world of what if's.
Use this time to re-evalute you, where do you want to be 5 years from now and how are you going to get there.
Have you attended any meetings? They were a life saver for me.