Him not coming around could be any number of things. It might be that it's over, it might be guilt, it might be forgetfullness, it might be anything.
I think the most important thing for any of us to do is to DETACH. That means, do not let his actions (or lack of action) cause you to question, wonder, spin, etc. Quit worrying about what he is thinking, what he is doing, why he is doing it and just live you life and let him live his.
I know it's hard not to look for signs in every single thing that happens, but most things don't mean much of anything. Quit over analyzing the situation and just live life.
BFM
There is only one person who could ever make you happy, and that person is you. David Burns, Intimate Connections