I'm glad you enjoy teaching and everything went well.
You have so much to be thankful for, i.e., your job and most importantly your children. They are worth every breath you take. Yes, it's very sad that your h is missing out on their lives, but that was his choice and one day, he may regret not being a part of their lives...but for now, it's all about him.
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.