HELP!!!!Does he like me???

Okay so there's this guy i like but I'm not sure if he likes me. We have a cl together and he always walks me to my next cl. JHe also tries to crack jokes and look at me along the walk and tries to put his hand on my shoulder or bump into me. At lunch time i sometimes feel like someone is looking at me and sure enough when I turn around, I see him far off looking in my direction. Today he walked up to me from across the courtyard and asked for gum, I offered one of his friends who's a girl a peice( FYI she's not his girlfriend,I know cuz I asked but she gets really overprotective of him when he talks to me) and she said that she has gum already, and that made me wonder why did he come get gum from me when he knew that she had it? so, does he like me, and if he does, what should I do???