I met this kid on a trip and we really hit it off. However I don't remember what is last name is or what school he said he goes to. All I know is his first name, that he lives near Philly (but not the actual town he's from) and a picture of him. Can anyone help?

No there is really no way anyone can do that.

If you look at a map, and figure out the name of the town, then do a search on Facebook for the first name and town, perhaps you may after looking at 100's of face book pages find them.

Hey I found a memory card of a camera of someone else. While travelling in australia. On the camera were also videos where you could hear them talking in german. They also said names...
Anyway, I went on Facebook joined a group called "german travellers in oz" or similar and posted two pictures of some guys that were on many pictures as probably one of them is the owner or at least a good friend of him.
After a short time someone recognised the owner and I sent him his card. He was really happy, pictures he thought were lost came back.
I found another memory card, similar story. But sadly no one replied on that...

You've got the town close to his home. The chance that someone in philly knows him is verry high. And the chance that this person is the same age is even higher. So if he is at highscool try to ask in a Facebook group of the highscools in philly and maybe some other in towns around. Just make sure you don't give any information that is not needed. And preferably edit the picture you have and crop it, so you can only see his face.

Cheers and good luck