But his face had that hollow look, as if there was something gone... you know that look. The inward focus. Distantly attentive to the home you're missing, or the someone you're missing. That look that a bird has when it turns it dry reptilian eye on you. That look that doesn't see you because the mind is filled up with someone it would rather see.
Gregory Maguire, The Next Queen of Heaven
unrequited-love