How to date an angel

After preventing the destruction of earth as we know it, Aziraphale and Crowley have a new task (mostly because Aziraphale asked nicely and Crowley just couldn't say "No" to his angel).
So, of course, Crowley is trying to get Aziraphale to go on a date with him, or at least show the angel how he feels about him- but Aziraphale is really, really oblivious...