More sage advice from Snodderly. I will add that based on your son saying he's going to "get to the bottom" of why his dad left, there is a risk that he might try to take on the role of fixer or as "man of the house.". It's important that you do you best to ensure that your son not feel like he can or has to take on responsibility for getting his family back together.
me 45 H 46 T 5 M 2.5 BD Sept 6 2011 OW Sept 8 2011 Threw him out Sept 8 2011