"I might, but I'll need to walk out of this hospital first. I've told a few of my roommates off for talking about asking you out, so if I do it now, they'll know I'm a filthy hypocrite when it comes to seducing our brave Healers."

Also, if he's going for a dance, he'd like to be able to actually stand, so next week sounds about right. And it sounds like both he and Hermione both need something bright now. Something to separate them from the horrors just past.