When someone posts one too many selfies or flex pics on their dating profile or talks about themselves constantly during a first date, we might call them a narcissist. But a true narcissist is someone with narcissistic personality disorder NPD. The most recent edition of the Diagnostic and Statistical Manual of Mental Disorders lists nine criteria for NPD, but it specifies that someone only needs to meet five of them to clinically qualify as a narcissist. Please avoid diagnosing your partner in conversation. Rather, read on to gain some insight into the health of your relationship. It started as a fairy tale. Sure, we all love to feel lusted for.