But it seems you've started on the path. Detach, detach, detach. Words won't get him to come back.
Look for activities, classes that have childcare available. Don't know if you belong to a church but many have lots of things going on and often have childcare available. I don't belong to any church but took a Boundaries class at one and am looking at taking another class at a different church.
Do things for yourself, it's better that your son have a happy, composed mommy than a stressed out, depressed mommy.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss