Foolish Hearts by Emma Mills

When Claudia accidentally eavesdrops on the epic breakup of Paige and Iris, the it-couple at her school, she finds herself in hot water with prickly, difficult Iris. Thrown together against their will in the class production of A Midsummer Night's Dream, along with the goofiest, cutest boy Claudia has ever known, Iris and Claudia are in for an eye-opening senior year.
Smart, funny, and thoroughly, wonderfully flawed, Claudia navigates a world of intense friendships and tentative romance in Emma Mills's Follish Hearts, a young adult novel about expanding your horizons, allowing yourself to be vulnerable, and accepting—and loving—people for who they really are.