Interesting story. Well I know most guys are different from me but I would only put my arm around a girl while walking if I liked her. Though that is me now... as a slightly bit more mature 21 year old. In high school I was known to kiss girls on the cheek that I had absolutely no interest in so he might not like you!

>_< I can relate with the msn thing though. I girl I was/kind still crazy about asked for my aim and found me first. But ever since then, if I had to initiate the conversation. It is frustrating.

I usually can tell a girl likes me when I catch her looking at me or I see that she went out of her way to talk to me. Say something like... "I like it when you're around." Or when you see him, act all excited to see him.