উপদেশ on a crush?

Being male and having some experience with this sort of thing, I think আপনি should go somewhere private and talk to him a bit, and ask when it seems the least awkward. If he likes আপনি then he will either tell আপনি so almost immediately when আপনি ask, অথবা act very shy and embarrassed, and try to avoid answering. If he doesn't like আপনি (romantically; আপনি can be বন্ধু either way), then he will say so, অথবা he will think going somewhere private is odd and misleading. The worst that could happen is he will say he doesn't romantically like you. Discovering that early will be far better than trying to find out for far too long, rather than consider someone who might like আপনি back. It may seem embarrassing অথবা make আপনি nervous, but relationships cannot exist without a beginning. The best of luck!

just ask him if he likes আপনি I did that and needless to say a বছর later we got married. if he doesn't we'll his loss

Worst that could happen is if he say no.
Worst that will happen if আপনি never ask is a bunch of nervous tension of "What if?".
You'll either forget about him অথবা regret never asking.
So go ask him out.

Talk to him

I know this has already been ব্যক্ত দ্বারা everybody else & can be easier ব্যক্ত than done, but talk to him. Chances are though, that he'll either say no অথবা deny it, but if he shows any of the signs (e.g. blushing, অভিনয় awkward, getting defensive) then he most definitely likes আপনি & আপনি should do something; অথবা if your to shy, ask 1 of your closest বন্ধু to talk to his best friend in case he told them. Just try not to get too depressed if he honestly doesn't, there's still friendship.