Things I Wanted To Say by Monica Murphy

Seventeen-year-old Summer Savage, hoping for a fresh start at the elite Lancaster Prep, is thrown off course when she encounters Whit Lancaster—a powerful classmate with a cruel streak and a complicated past with her. After helping an injured Whit, Summer faces betrayal when he steals her journal and uses it to manipulate her, igniting a dark, obsessive relationship that blurs the line between hate and desire.