Did this mean anything? *Short Question*?

Well since he hasn't seen you since spring, I think he just wanted to say hi and talk with you a little, especially since you guys didn't get to hang out, but didn't get a chance to say hi to you. He might've been a little shy too...or busy with his friends and didn't want them to tease him about you. Smile and wave to him...that doesn't have to mean anything but it should be enough for him to say hi to you. Good luck!