By the way, even "good" and "happy" marriages can have affairs. If you get a chance take a look at the book. "Not 'Just Friends'" by Shirley Glass. It has a lot of interesting research and it helped me understand affairs much better. http://www.amazon.com/Not-Just-Friends-Relationship-Infidelity/dp/074322549X
Husband, I'm glad to hear you're doing some things for yourself. Have a great time with your son. I think it's wonderful he's your best friend, but do try and make some more buddies. Maybe join a poker group, find a church with social groups, get together with some guys from work, etc...
There is no arriving, ever. It is all a continual becoming.
