I don't even know what to say about these two today. Just remember what it was like somewhere between 16 and 24, when love was young, intense, passionate, and unclouded by responsibilities and the daily grind. That's where they are in their relationship.
The only reason they ever let go of each other is because Crow has to go to work and Harley has to go to her classes. The first time Crow saw her, he had just gotten back from helping out some family in Alaska, and was stretching his wolf legs in the woods, when he smelled her and her friend, MJ. He was totally hooked on her scent and started thinking about how he could find her again and meet her in human form.