I'm sorry that you are feeling a bit down, but you will have ups and downs along the path and that's why it's called the rollercoaster of emotions. It's a one step forward, two step process.
You may not hear anything from him for a while. They do tend to disappear for days, weeks, and even months. Why? Because they are out there discovering the world of no responsibility and having what they consider fun, just like teenagers. Eventually, he will contact you, especially if he wants or needs something from you.
Have you given any thought to unblocking his number on your phone? It might be a good idea to do so in case of an emergency, but that's up to you. As for contacting him, I would leave him alone and allow him to come to you. Don't worry...he still thinks of you, especially at night when all is quiet in the world and he has no distractions to focus on.
Continue to focus on you and your family for now. When he's ready, he will contact you.
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.