He could ask. Crowley could ask, and the angel could tell him he doesn't have any specific expectations. All he wants, all he needs, is to share the time, the closeness, with him, and he'll be more than happy with that. The rest is secondary.

His other hand meet's Crowley's back as well, holding his slender figure as close as it gets, a gentle, quiet sigh through his nose as they continue sharing their kisses. Which, he's found, are quite good, and he might find himself wanting more of those the moment they stop.

Perhaps waiting for Crowley to take the steps is a bit selfish of him - he's selfish in many ways, has been, often sorry for it -, but it's that part that's metaphorically holding onto his arm and seeing where they end up.

Not that he doesn't have a fairly clear idea, at this point.