Lots of assumptions there. I might be the one point of light in his day. The one affirmation of his existence in his otherwise joyless, friendless world. Yes, he can't summon a reply such is his inner despair, but maybe, just maybe, my welcoming smile and breezy "Morning!" is the one thing he looks forward to.
Come to think of it, I didn't commute in today. Or yesterday. God, what have I done! I must, however fucking lazy I feel in the morning, get on my bike and ride that damned commute. Not for my sake. But for his.