Diagnosing a personality disorder requires a comprehensive evaluation by a qualified mental health professional.
However, I can offer some insights based on the description you provided. Narcissists can display a range of behaviors, and the way they end a relationship can vary. Some narcissists might push their partner to break up with them as a way to maintain their sense of control or to avoid taking responsibility for the relationship's failure. By making the partner initiate the breakup, they can position themselves as the victim or portray the breakup as someone else's fault, not their own.
It's important to consider the overall pattern of behavior in the relationship rather than just one specific action. Traits commonly associated with narcissism include an excessive need for admiration, a sense of entitlement, a lack of empathy, manipulative tendencies, and a preoccupation with self-importance. These traits are often consistent and observable across various situations and relationships.
If you believe that you have been involved with someone who has narcissistic traits, it's essential to prioritize your own well-being. Narcissistic relationships can be emotionally draining and harmful. If you're struggling to cope with the aftermath of the breakup or any negative experiences from the relationship, consider seeking support from friends, family, or a mental health professional who can help you process your emotions and heal from the experience.