How do i no if this boy fancie's me plz help?!?

there's this boy at ma skl n i always catch him starrin at me n wenever i luk he either luk's away or keeps on starin!!! he always randomly sings 2 me or talks about reli random stuff n sometimes teases me 4 a joke. 1 time he was gonna cheat in a test cuz he had the answers written on his hand. he wudn't rub it off 4 his m8's but wen i sed "go on jus rub it off if u don't need it" he went alrite n rubbed it off his hand. wen we do stuff in groups n we have 2 work wiv the table in front of behind of us instead of doin the work he chats 2 me. we had a supply 1 lesson n this girl was callin me n i luked she sed tht he fancied me n i heard him screamin no but i didn't no if i heard her rite. .wen i'm walkin in the corridors as we walk past he always starin at me n wen i walk in a clroom he watches me until i sit down or i luk at him. wen we do role plays he always watches me n none of ma m8's. my m8's say he fancies me cuz wen i was ill they sed he asked where i wasn they told me he always stares at me in science wen i'm writin. if ever i drop somethin he's always there 2 pick it up n in math's if ever he doesn't no an answer he asks the boy next 2 me instead of the like reli smart 1 next 2 him. if he doesn't no the answer he always say 2 me "well do u no by any chance i dount it but stil" starin strait in 2 ma eyes n smilin i say bk "oi cheeky" n he jus sez "aww i'm sorry. jk. lol" . i no it's alot but i reli need 2 no lol!!! plz can u tell me if he fancies me or not!!! :)