Well, I am not sure, but have you honestly told him about your
feelings for him? As in, actually say 'I like you or love you...'?
Or did you just hint to him, that you like him? If its the latter,
then you should try confessing to him your feelings and how much
you love him. If he says no, take some time off from spending too
much time with him until you feel that you have moved on. As for
his frens, are'nt they your friends as well?
There's another evil way, which I doubt you should take but I will
mention it to you, that is to go after his close fren... WARNING
this tactic seldom works, but most of the time hurts you and the
close fren.
Other than that, once you have moved on, you can see him as a good
friend and nothing more than that...