Cool for the Summer by Dahlia Adler

Lara’s had eyes for exactly one person throughout her three years of high school: Chase Harding. He’s tall, strong, sweet, a football star, and frankly, stupid hot. Except she’s haunted by a romantic, strangely perfect summer spent with a girl named Jasmine. A memory that becomes a confusing, disorienting present when Jasmine herself walks through the front doors of the school to see Lara and Chase chatting it up in front of the lockers.

Lara has everything she ever wanted: a tight-knit group of friends, a job that borders on cool, and Chase, the boy of her literal dreams. But if she’s finally got the guy, why can’t she stop thinking about the girl?