Maybe just use the I statements to let him know how you feel. Something like, "I was really bummed that I didn't get to enjoy watching the game with you." Make sure it's about you and not him. Then walk away.
As for your S14, talk with him "I noticed you were looking for dad while trying to play your game. Have you told dad how you feel about him not being there at the start?" Don't get into the middle of their issues. You will seem like you are mothering your H. Guide your S to openly talk to his dad about the way he is being treated.
As for the date thing, maybe just mention you were interested in doing x,y,z and wanted to see if he would like to tag along. It's an open invitation, but remember not to have expectations. Then go do x,y,z.
Good luck with what ever you decide to try!
Atsbaby M:36 H:35 T: 19 M:12 S:11 D:9 BD: 5/4/14 Proof of OW 8/13/14-love note from her 8/19 admits OW 8/22/14 files D w/o telling me 9/20/14 Says he wants to reconcile
