The Day Human Prince

Devin Alexander grew up as the only day human in a world surrounded by night humans who drank blood, sometimes his blood. He spent his life training toward one goal: the protection of one of those blood drinkers, Arianna Grace. But what is he supposed to do when the blue-eyed girl of the legends doesn't need him anymore? What does his life mean then? How is a guy supposed to move on when the girl he has yearned over for a decade has chosen someone else?
Before he can even start to figure out...