Mandy, He is entirely too wrapped in his new life, new wife and environment. The euphoria of that newness has not worn off. Eventually, he may come around. I have seen some of them move on completely and never have contact w/their children. It's something within themselves that is broken and it takes a lot of work and time to repair that damage and those sickos are the ones that won't do the work. They would rather continue to run then face the guilt and shame of what they've done. Time will tell about your son's father. I certainly wouldn't hold my breath on him contacting him at this time. I'm sorry that I had to post this, but we can only hope that things will turn around, but it's a 50/50% chance that he will do the right thing at some point. Mandy, do not wait on this man. Make a life w/your son. You are a good mother and will show him the world and give him the love, admiration and validation he will need to grow into a well rounded young man.
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.