The behavior described in the scenario could be indicative of manipulative and exploitative behavior, which can be associated with both narcissistic personality traits and antisocial personality traits. Let's explore each possibility:
Narcissistic Behavior: Narcissistic individuals often have an inflated sense of self-importance, a constant need for admiration, and a lack of empathy for others. They may exploit and manipulate people to achieve their own goals or to maintain their self-perceived superiority. In the scenario you described, the person's statement reflects a lack of concern for how their actions affected you, demonstrating a disregard for your feelings and well-being.
Antisocial Behavior: Antisocial individuals exhibit a pattern of disregard for the rights of others and a lack of remorse for their actions. They may engage in manipulative and exploitative behavior to achieve personal gains, without considering the negative impact on others. The statement made by the person in the scenario, acknowledging that they took advantage of you for a prolonged period, aligns with the exploitative tendencies seen in some individuals with antisocial traits.
It's important to note that personality traits and behaviors can vary, and not everyone who exhibits manipulative or exploitative behavior necessarily has a personality disorder. However, individuals displaying such behavior can be harmful and toxic in relationships.
If you find yourself in a situation where someone has explicitly admitted to taking advantage of you for a significant period, it's essential to prioritize your well-being. Consider seeking support from friends, family, or a mental health professional who can help you process your feelings and guide you on how to handle the situation appropriately.
Ultimately, the specific diagnosis of a personality disorder should be made by a qualified mental health professional based on a comprehensive assessment of the individual's behavior and history.