Hunters of the Night (teen/vampire fiction)

A girl is reincarnated as the protector of the Blue Blood Vampires. When she gets kidnaped by a few blue bloods she is brought to a counsel that brings her up for sacrifice until they realize she is their only hope to live in happiness instead of their sad, gloomy, never-ending lives. She finds herself fighting for the foe of her family and loving none other than a Vamp himself.