A 32-year-old woman presents to the psychiatry clinic with her husband, who reports that she has been increasingly controlling, demanding, and emotionally volatile over the past 5 years. She becomes enraged if he spends time with friends, accuses him of infidelity without evidence, and threatens self-harm whenever he suggests couple's therapy. She describes an intense fear of abandonment and admits to impulsive spending, binge eating, and occasional cutting when stressed. She has had four jobs in the past 3 years due to conflicts with coworkers. Her relationships are marked by rapid idealization followed by devaluation. She denies any psychotic symptoms or mood episodes lasting more than a few days. What is the most likely personality disorder diagnosis?