[He doesn't have to ask: that look makes it perfectly clear that he's reluctant to leave his friend, and it isn't as if David has anywhere else he needs to be.]
I'll stay with Dr. Xavier until you return. I can also clean your old clothes, if you'd like. [Or destroy them, if they turn out to be unsalvageable. Or maybe just an unpleasant reminder of something he'd rather move on from.]
[Spam]
I'll stay with Dr. Xavier until you return. I can also clean your old clothes, if you'd like. [Or destroy them, if they turn out to be unsalvageable. Or maybe just an unpleasant reminder of something he'd rather move on from.]