Definitely let the teacher know. They may be seeing signs of stress in your son in relation to the way he is handling other kids, classwork, etc.. I let my son's teachers know almost immediately so that they could help me watch for stress in him. Remember, we entrust these people to spend more time with our kids than even we get to. Trust them to help you at this time. You deserve as much help as you can get.
As far as having your W committed, there is A LOT involved in that and there must be specific cause (i.e. - suicidal, self-mutilation, violence). Unreliability and selfishness can't have someone committed unfortunately. I guess if it could, we would all have our spouses locked up!
T19 M15 S19 XH47 M43 bomb12/4/07 PA5/07 S12/26/07 D final 11/17/08 Back together with no defined R 05/2010 confused....to say the least!!!