He knows what Watson's saying with this kiss, but then he suspected -- knew that Watson felt this deeply for him; he doesn't need to hear it in words so much. It's so much sweeter to deduce it from Watson's drowsy expression, from the slow press of their mouths.

He settles himself on his pillow again and winds an arm around Watson, pulling him close; he fully intends to sleep pressed as tightly to Watson as he can possibly get.