"Have you ever been so obsessed with someone that your entire world revolves around them – even when they ignore or hurt you?" asked Professor Ahmed Hankir in a TikTok video. The psychiatrist explains that an obsessive fixation on one person may not be love at all, but limerence—a symptom sometimes seen in borderline personality disorder (BPD), a condition affecting about 1.6–5.9 percent of U.S. adults, according to the National Alliance on Mental Illness ( NAMI ). Hankir told Newsweek : “