Do he like me & what can I say to be his friend?

So he brushed his hand up against my side once or waist, he says wup to me when he sees me which is like once a day cause we only have one cl together in highschool. he grabbed my arm when he saw me walking in the hallway once and he always making faces at me like playful. He gave me a handshake before and was like playfully holding on like he didnt want to let go and he alwasy want to be my partner in cl cause one time we had to choose a partner and asked me but we do sit right beside each other but still he could've choose anyone in the cl and he knows alot of people in our cl that he's alot closer to then me but chose me. He's really popular and I just hang with my closest friends and then the next day he kept tellign em answers and talking to me and stuff when we were suppoe to be working independently. Was he just finding a reason to talk to me. I always have trouble talking to him cause we have nothign in common but the one time i talked to him i said "your brother is cute" and he said "how you see my brothers" and i sad "facebook" and he said "well you know it run in the family" and i said "you look a little bit like them" (btw he brothers are alot older and i was just making conversation) then he said "iyou going to the game" and i said "idk" and he looked dissappointed & was like "you not going . . . did you go to the last one?" and i said "yeah varsity" and then the bell rang. what do you think about our conversation, and do you think he likes me, by him always trying to get my attention or is it just normal boy behavior? what should i do. how can i get to be his friend more and what can i say?