Falling (Ethereal Witch Book 1) by Tori Briar

Falling is the story of fifteen-year-old Kallie, an introvert with a mean round-kick, who has survived the reoccurring violence of a family curse only by faithfully following rules she must now break to stay alive; and Adlai, a powerful but lonely vampire who, through contact with Kallie begins to rediscover emotions he thought lost after his change. Their interactions force them to face the same decision: stay as they are, or evolve into someone new. Book 1 of the Ethereal Witch Series