I can understand believing that, and it's likely true for some people. I don't think that all people with BPD are the same though - there's a wide range of severity, and comorbidity. She was actually the one who told me that she thought she was BPD, and wanted to get better.
If I thought she was truly sociopathic, I'd cut ties with her.
If I thought she was truly sociopathic, I'd cut ties with her.