Does it seem like he likes me?

I really like this guy and i think he likes me to...what do u think? We were at my school lock in and I were singing Rolling in the Deep, the part that goes "you had my heart inside of me but you played to the beat" when I walked past him becasue it was playing in the gym which I just walked out of and when I passed him he said "Wow way to show you're affection back to me." And later on when me and my friens were laying down in the cafeteri, watching a movie and talking, he came with his friends and layed down right next to me! <3 And once me and me friend were downtown and we saw him and his friends and we were wearing matching dresses and one guy goes "look siamese twins and then they were all stairing and poiting and talking about us and when we got to the end of the street the guy i like yelled "Hey come back" but i didnt cuz i was scared): Then the next day he was stairing at me while he was whispering with one of his friends and he goes "her". And there was huge group of guys in out choir class that wasnt supposed to be there but they are his friends so they came and they were all stairing at me and talking and then one of the them comes and trys to grab my butt but i slapped him and they were all laughing except the on ei like who's face was bright red and he looked really mad and embarased. Also he is constantly stairing at me(: And when i asked him to sign me yearbook he put a heart by his name and he didnt so that in any one elses! So what do u think...does he like me?