This can result in the person with BPD engaging in destructive behaviors that can hurt themselves, their livelihoods, and you as well. Fleeing a relationship instead of discussing a break up with your partner can lead to a lot more questions than answers, and will likely be harmful to both parties. The DBT Method. Cynical, sullen or hostile attitude. Frequent complaints about feeling underappreciated or cheated. Although passive-aggressive behavior can be a feature of various mental health conditions, it isn't considered a distinct mental illness. However, passive-aggressive behavior can interfere with relationships and cause difficulties on the job. If you wonder sometimes “am I a sociopath?” and try find out how to know if you are a sociopath, take this sociopathic personality test. The Sociopath self-test is a free online quiz to check for this specific personality disturbance. Being a sociopath or sociopathy is a traditional definition associated with behavioral disorder, which is called, in medical diagnostic terms, antisocial.