Does he like me?

Okay , so I just got back from a college trip to New York and me and my friends went around with these three boys that we knew from high school but never really spoke to until this trip. As this trip went on I started to like one of the boys and I think he might like me but, I'm not sure. He held doors open for me, teased me and laughed at my jokes and looked at me straight in the eyes when I spoke to him. He also made small movements like he was trying to touch my arms and legs. He also has liked everything i've put on facebook since the trip. I don't know if he's trying to be my friend or if he likes me more? Can someone shed some light on this please? Thanks