Books like Goodbye, Perfect

When I was wild, you were steady . . . Now you are wild - what am I? Eden McKinley knows she can’t count on much in this world, but she can depend on Bonnie, her solid, steady, straight-A best friend. So it’s a complete shock when, five days before the start of their GCSEs, Bonnie runs away with a guy Eden knows nothing about. And it's the last person she would ever have expected.As the days pass, and her world begins to unravel, Eden is forced to question everything she thought she knew about her best friend and herself.