"Turns out, I am mentally ill. Aspects of my current brain chemistry resemble that of a person with obsessive-compulsive disorder. I haven't started turning the light switches on and off or urgently avoiding sidewalk cracks. But I have been shopping for beauty products and underwear in a fever. I read cookbooks now. I spend an embarrassing amount of time looking at myself naked. My classic symptoms—involuntary preoccupation, mood swings, emotional sensitivity, enhanced sensual awareness—are what tip the diagnosis. I am limerent."