He is infatuated. There is no other way to describe the compulsion he feels to be near the girl. Complete and utter infatuation.

It was just a predator stalking its prey. Yet, three nights had passed and he found himself content with just watching from afar, dreaming of the way her hair might feel between his fingertips. She was just prey, he must remind himself. For a demon can’t truly feel anything for a human beyond hunger. Tonight he would move. Tonight he would hunt his prey.