He look at u have many reson:because u look at him so he look back u.
Or he really like u.Maybe u can be his friend first,then u can know more about him.
I have a experience!
I am a boy!When i am P.6,a girl love me.But i dont really love her!
I can give u another not really good suggestion.When u always talk with him,phone him,then if he dont love u ,some day he will told u he dont like u.
If u use this suggestion you need to have a preare that he said he dont love you!Because I do that to that girl