Irish, You may not have been able to do everything for your son, but you did the best that you could and you know what? That means a heck of a lot to your son. You have been there for him and the rest of your family. You are a wise and stable influence in their lives.
As for the game on Valentine's Day, maybe cupid will put other plans in their heads and they'll go out for dinner, etc., and not show up for the game.
Hang in there!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
