A 35-year-old woman is referred to psychiatry by her general practitioner after multiple visits for vague somatic complaints over 2 years. She reports frequent headaches, back pain, and gastrointestinal symptoms that have been extensively investigated with normal findings. She is highly dramatic in her presentation, frequently uses theatrical language, and becomes upset when her symptoms are not taken seriously. She dresses provocatively, flirts with the male physician, and her affect is shallow despite describing distressing symptoms. She has had multiple brief romantic relationships and reports feeling bored easily. Cognitive testing shows no deficits. What is the most likely personality disorder?