I'm in love with someone I met once. What do I do?

So I have a tutor and today we did intensive revision for 4 hours, there were some other people there but they came and went. It was just me and this one boy there for the whole time and we kept ending up alone together in the room. We didn't speak at first but then after we did chat a tiny bit and right at the end i was walking out and he said bye to me, but it wasn't just 'bye'. He smiled at me and did this really cute laugh, i know we had a connection and i could tell he was interested. But the thing is. I've been trying to find him but he doesn't have anything. He doesn't have facebook, twitter, instagram or anything! I was surprised because he had an iphone. The only way i could get in contact with him is his number and i don't have it. If i don't see him on saturday ill never see him again. WHAT DO I DO?!

Cry yourself to sleep now you're going to be lonely forever

Ziggy played guitar du du du du du du du and the spiders from mars could play it left hand but took it far du du du du du du