It's important to note that motivations for behaviors can vary significantly among individuals, and I cannot provide a specific answer without knowing the person in question and their unique circumstances. However, I can speculate on some potential reasons why a person with psychopathic traits might express such a statement:
Manipulation and Control: Psychopaths are known for their manipulative behavior. By acknowledging their inability to be good for you, they might be attempting to lower your expectations or make you feel more dependent on them emotionally. This tactic could be a way to maintain control and power in the relationship.
Maintaining the Relationship: Expressing a desire to stay with you despite knowing they might not be good for you could be an attempt to prevent you from leaving the relationship. Psychopaths might fear losing a partner who provides them with emotional or material benefits.
Ego and Self-Image: Some psychopaths have an inflated sense of self-importance and might feel the need to keep you around to validate their own ego. They could enjoy the idea of having someone who cares for them, even if they are unable to reciprocate those feelings in a healthy way.
Thrill-Seeking: Psychopaths often engage in impulsive and risky behaviors. Staying in a relationship despite knowing they are not good for you might be a way for them to satisfy their need for excitement and emotional intensity.
Avoiding Rejection: Psychopaths might be afraid of rejection or abandonment. By expressing a willingness to stay in the relationship, they may be trying to avoid being rejected themselves.
Isolation: Psychopaths might isolate their partners from friends and family as a way to exert more control over them. Telling you that they are not good for you but still want to stay could be a way to alienate you from other sources of support.
It is essential to remember that individuals with psychopathic traits can be highly skilled at manipulating and deceiving others. Their motivations might not always be apparent, and they could be saying things for strategic reasons that may not align with their true feelings or intentions.
If you find yourself in a relationship with someone who exhibits concerning behaviors, especially those associated with psychopathy or other personality disorders, it's crucial to prioritize your safety and well-being. Seek support from friends, family, or a mental health professional who can provide guidance and assistance.