Yup, he's not your responsibility any more. Not that he ever really WAS, but one of two things are for sure. He's either drinking again, in which case you can be grateful that you no longer have to deal with it. OR he's not drinking, but obviously hasn't become the kind of person you would want as a partner. Again, something you can be grateful for.
It's too bad that your daughter won't have a caring, capable father, but she has a loving, capable MOM. And someday she may have a loving, capable dad-type-guy in her future.
The best thing you can do for yourself and your daughter is to heal. It doesn't happen overnight, and it's sometimes painful, but it will be SO worth it.
I second HG, get a good night's sleep in your own peaceful home. You have a lot to be thankful for.