I don't see why nothing can happen from what you've said. Plenty of times things happen when they really, really shouldn't. You get people who 'hated' each other 2 hours ago ending up in bed, and it's not like you're that opposed is it?
If you want something to happen, make it obvious. Don't play games and tease him with code that he probably doesn't get. Kiss the man. If he doesn't respond, laugh it off and go back to being friends.
If you're interested in plausible deniability, get slightly sloshed first and blame the drink. I've never held people making passes at me against them, I don't see why he would.