Poke him... do ittt!! LOL
I'm sorry but guys are really difficult!
and you can change like your quotes or something, maybe delete one or add a new one...
that way... your name will show up on his news feeds (if you guys are friends, which I'm assuming you are) and it'll remind him you exist!! :-D
this is the way I stalk and remind without bothering...
or you can leave a wall post saying something like ...
"we go back to school in __ days/weeks. i can't believe summer's ending already."
