Behind Brown Eyes (Sweetest Love, Book 1) by Nicole Highland

Love was never something Devin Brandt thought he could feel, but everything changes when he meets Natalie Sorenson during his senior year of high school. But when his aunt Christine informs him that he will have to move at the end of the school year, the hopes and dreams he and Natalie created come crashing down. The strain on their relationship tears Devin and Natalie apart, but will tragedy ultimately reunite them once more?