Congratulations to your son on his graduation from college! You have so much to be proud of! As for your h, this is your son's big day and all focus should be on him and his accomplishments. Don't allow your h's attendance to take away from that.
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.