Maybe he just likes you as a friend, if he's friendly by nature as you say - then if he liked you more I don't understand why he wouldn't pursue anything further than a "hello". Why don't YOU try talking to him? You never know,I could be way off and maybe he's shy when it comes to girls.
To love is to suffer. To avoid suffering, one must not love; but then one suffers from not loving. Therefore, to love is to suffer, not to love is to suffer, to suffer is to suffer. To be happy is to love; to be happy then is to suffer, but suffering makes one unhappy; therefore to be unhappy one must love or love to suffer or suffer from too much happiness. I hope you're getting this down.