"selective sociopathy" is not a recognized or established psychological or psychiatric term. Sociopathy itself is not an official clinical diagnosis, though it is often used informally to describe a person who exhibits antisocial or manipulative behavior, lacks empathy, and has difficulty forming genuine emotional connections with others. The term "sociopathy" is often used interchangeably with "antisocial personality disorder" (ASPD) in colloquial language.
It's essential to remember that diagnosing someone with a mental health condition, especially something as complex as a personality disorder, should be left to qualified mental health professionals. Self-diagnosis is not a reliable way to determine if someone has a particular disorder.
If your friend does display characteristics or behaviors that concern you, it might be more helpful to encourage her to seek professional help from a licensed mental health provider. They can conduct a thorough assessment and provide appropriate support or treatment if needed.
It is also important to avoid stigmatizing language or labels and instead focus on understanding and supporting your friend in a non-judgmental way. People can have difficulties and struggles, and seeking help is a positive step towards personal growth and healing.