He Chose the Pick-Me, So I'm Done

My boyfriend Julian promised to protect me. Then his friend Sienna soaked my white dress in champagne, called me an attention seeker, and watched him take her side. When my engagement ring turns up in her purse, she says I planted it. Julian demands that I apologize. I've spent my life backing down. This time, the man who swore to protect me is the one I'm leaving. How will he react when his favorite pushover finally walks away?