Ok guys, and girls, does he like me or not?

Ok, there is this guy, his name is greyson. He is showing signs that he likes me, but idk if he does for sure. ok here are some things that he has done:

*in science, (our only class together) he always looks over at me, but when i look over at him he looks away.

*when i pass him in the hallway he is talkin to his friends he starts laughing like hes having fun

*we talk on myspace and we ask each other questions and things and talk alot.

*we used to talk on the phone, but his phone got cancelled.

*I told him he needed to get a facebook on friday, and this morning...he got a facebook.

*His arm brushed up beside me on the way to the bus and he said sorry, and then i asked him a question, after i asked he answered and said bye.

*On the phone we were talkin about who was pretty and who we liked and i asked him did he know anyone who thought i was pretty and he said well, i think your pretty and--then his phone "went dead"

*One day i did one of his friends homework at the boys nd girls club bcuz i was bored and i already had the answers and at school he was all y did you do drins homework? and i said idk i was bored. and then he said oh, ok! and then he talked to drin and then drin gave me a mean look.

*This mean girl at my school likes him too, and she always tells him she hates me, and always talkes about me behind my back, cuz she likes him. and i asked him does he like her and he said "she scares me" and she asked him out and he said **** no i like sa-somebody else.

We are in the seventh grade if that helps.

My 2 questions are

1.does he like me

2.why exactly do u think that he does

10 points if you answer both questions!!! thank you thank you!!!