Please help?! how do i no if he likes me!?

Well it seems like you are not in love with him but you are attracted towards him since everybody likes him.his nature is good,he is funny,caring and most important thing friendly.Well attraction is 1st thing in love.What i suggust you is simply go and ask him whether he has girlfriend or not.Notice how he tells if he smile and tells you no i dont then he might be intrested in you.but seriously or confidently if he teels you yes then he really has one.Make sure you ask him in Friendly manner.don't ask directly slowly change the topic before and ask.good luck.