((Petmagnet)) I do know how you feel. My ABF's situation is more unpredictable though because he works in restaurants and does not have a set schedule. He goes out twice a week and, like your AH, sleeps at least until 11 am or so.
It hurts like hell. I am also working on detaching, but while I am doing that I am also considering whether this is what I want for my life and making alternate plans. I hope you are as well. When we are ready to go, we will know.