J.S.
Unfortunately, you can't push him into doing all of his responsibilities. If he feels over-pressured (which I'm not saying he is), he'll resent having to be around your son, and the only one to get hurt will be your son. I know how much the absence hurts the child, but it would hurt him worse to be around someone who didn't really want to be there for him. If he wants to be the supplemental paycheck and gift giver, let him. You are right, that would be an ideal situation to a lot of moms. A lot of them have it backwards; no help financially and someone who complains for more and more time with a child they refuse to help support. The guy sounds like he is scared to actually be responsible for a child when no one else is there to help him with it. Let him be the one to suffer when he wakes up one day and realizes how much he has missed out on. You sound like you are doing a great job on your own, hard as it may be. The most you can do is tell him that your son asks about him and wants to get to know him better, but then it is out of your hands. Contrary to popular belief, especially in our area, having both parents isn't always the best thing for a child. Many kids adjust fine with only one parent who is always there for them. Good for you for making it work, and screw him for what he's missing out on. (Sorry, I was a single mom for awhile, too. Does it show? haha)