Robby, that is exactly what I was going to suggest for you! going to class of some sort...having new stuff to think about. act like your son is invisible. do not focus on him. keep in mind that the tactics you have used in the past did not change him.
his experiences are in his mind. he is being helpless and perhaps hoping someone else will figure this out. let his dad step in there. smile often as you wave goodbye to them on the way out the door to class, lunch with a friend, shopping, even a walk.
let this load set down on husband's shoulders for a while. keep smiling.