Honey, you don't have to describe your sadness here. We know it too.
In regards to the hi/bye thing at exchanges, I'd leave it alone. That'll show him it bothers you and you know what he ends up doing when he learns of new ways to push your buttons... Maybe use S to model the polite behavior you're wishing for. Cheerfully say, "Junior, tell Daddy bye-bye." or whatever is appropriate for the situation. Then you can gloat of being the bigger, more adult person there.
Stay strong Hope!
Me38,H:38,S:7 Married:6/99 Bomb:7/04 Sep.:5/05 D Filed:3/08;Final 1/10 Piecing:11/09 H moved back:09/10 Current thread: http://tiny.cc/htcty