"Couldn't sleep?"

I don't really know why I'm asking when the answer is stood right in front of me. His returning smile is sad, and if I knew him better, I'd ask him what's wrong, but I'm scared that he won't want to open up to me.

I'm practically a stranger.

Besides which, I'm still unsure of those boundaries. If this is just sex, the last thing we should be doing is talking about our feelings. He's already told me so much, and I get the impression he's shared more with ...