Evermore by B.B. Reid

Four Archer was the toughest girl around. Just ask anyone. She’s the street racing daredevil who brought the King of Brynwood Academy to his knees. But watching her boyfriend fawn over his childhood playmate–even though it was just an act–would be her toughest challenge yet. When jealousy rears its ugly head, Four questions if she can handle playing the sideline.
Ever McNamara has the world at his fingertips, but not even a private jet and a seven-figure trust fund can get him out of this rock and a hard place. When a childhood pact puts their fairytale in peril, Ever must risk it all to keep her.