The Opposite of Love by Sarah Lynn Scheerger

Rose is the wild girl nobody really knows. Chase is haunted by his past. Both are self-proclaimed "disappointments," attracted to each other enough to let down their defenses. When Rose's strict, adoptive parents forbid the relationship, it only makes things more intense. But Chase can't hide from his own personal demons, and Rose has secrets of her own. After they're wrenched apart, a cryptic email arrives in the middle of the night on Christmas Eve, beginning a desperate pursuit and a look back over their tumultuous romance. Will they find each other before the night is over, or will they be torn apart forever?