If he's not expecting to get laid seeing you it's completely understandable and would mean very little. If you guys had fucked and the same thing happens, that's bad. Just fuck someone already, do it because sex with them seems like fun. Don't figure out if you're getting married first.
This shit is on my mind too and I'm on the level of effort where I would prefer to say, "you wanna go over there and suck my dick or something?"
But that's a little rude.