Why won't he talk to me?

[anon]

So there is this guy. We used to be friends about a year and a half ago, but then I moved. Now I've moved back and he doesn't talk to me anymore. I figure this is normal, we've grown apart. But today our parents were talking and we were there as well, basically in a situation where we would be forced to talk to each other or at least even LOOK at each other. But he never even glanced in my direction.

I know he doesn't dislike me, though, because he said "go ___!" to me when my name was called for an award I had to go receive, and he also liked my profile picture and talked to me once on facebook. SO what is going on?! Why won't he talk to me or even look at me in person!?