Hmmmm... Is he into me? Please HELP!!!?

So last night I was hangin with a friend at a show with a bunch of bands. At one point (when a crappy band was playing) I walked outside on my own. I just stood there leaning against a bike rack texting and looked up as a crowd ped by. This REALLY cute/hot/whatever you wanna call it guy who was walking with them looked at me, smiled and waved. I smiled and waved back. Later, after I went back in, he approached me at a merch table, introduced himself, and asked what I was doing outside before. We started to have a conversation and there was a lot of smiling and direct eye contact. Then my friend came over and RUINED everything by being all immature and giggly and random. Then a guy in his band told him he needed him outside, so he told me he'd talk to me later and left. Later I saw him again but a bunch of people were talking to him, but he smiled and waved again. Everything about him was just so genuine, unlike all these other pervs and creeps that approach me. I didn't see him again after that... what should I do? Should I look for him on facebook or something? Do you think it's worth it.. does it seem like he's just really nice, or is he into me?