Arcadia's Gift (Arcadia - Book 1) - Arcadia, #1

Most people who experience death don't live to tell about it. When sixteen year old Arcadia "Cady" Day wakes in a hospital after experiencing what can only be called a psychic episode, she finds her family in tatters. With her twin sister gone, her dad moved out, her mom's spiraling depression and her sister's boyfriend, Cane, barely able to look at her, the only bright spot in her life is Bryan Sullivan, the new guy in school.
When Bryan's around, Cady can almost pretend she's a regular girl, living a regular life; when he's not, she's wracked with wild, inexplicable mood swings. As her home life crumbles and her emotional control slips away, Cady begins to suspect that her first psychic episode was just the beginning.