I say if he is trying to contact you, be open to it. Don't get angry or yell.... It is possible for you two to end things and still be close and care about each other.
I also don't think this means that it is over for you two for good. I have found that what you think at this age will SO often change. When I think back about the things I was ADAMANTLY CERTAIN about 2 years ago....
I'm not saying that you would or should ever try to change him. What I AM saying is that he should NEVER SAY NEVER. He may be certain now that he never wants kids. But, someday he will find a woman who will mean more to him than anything (and this could be you). At that point, I think there is a very good chance that he will realize that his life is not complete without this woman and children of their own. I have seen and heard it before.
So, I guess my advice is don't expect that to happen, but DO talk to him in a civilized manner. You two obviously still care about each other, don't throw away that friendship because right now you want different things for the future.
P.S. This post might not make much sense cause I was writing it really fast.
