I don't really have anyone else I could contact to find out about him, and more than anything else I just want to know what's going on in his life. I don't love him, I don't have feelings for him at all, I'm just curious. Frankly, I have a lot of trouble believing that's why you don't want sex more often. Perhaps you're worried that more sex will make you pregnant sooner, which you say you can't afford. However, you can afford a new home and all that education, so that excuse doesn't hold water either.
Many people have children rather than buy new furniture.
I think there are other reasons you don't want to have children right now, ones that you haven't really faced. What's strange is that you do seem to have time for thinking about an old boyfriend. You are even willing to find time to look him up. If you can find time for all that, you can find time for sex. Less time than looking up an old boyfriend who's happily married.