The Memory of Us by Dani Atkins

If she had been found moments later, Amelia's heart would have stopped and never recovered. Instead she was taken from the desolate beach to the nearest hospital just in time to save her life. When her sister Lexi arrives from New York, Amelia's heart is beating, but the accident has implanted a series of false memories. These memories revolve around a man named Sam, and a perfect love story that never existed. Determined to help her sister, Lexi enlists the help of Nick, a local vet who bears a striking resemblance to Sam. Together, Lexi and Nick recreate and photograph Amelia's dream dates in the hopes of triggering her true memories. But as love starts to stir between Lexi and Nick, they must navigate a complex web of emotions. How can Lexi fall for Amelia's dream man without hurting her sister?