Does this individual tend to have a marked lack of compassion or empathy towards you and others most or all of the time? (or at times appear to have empathy towards others excluding you.)

When you try to hold this individual accountable for their actions or behaviors do they become angry, blaming, avoidant, dismissive, victimized or misdirect you in order to avoid responsibility?

Does this individual tend to display any behaviors that could cause harm to people's emotional, mental, physical health or tangible resources such as money or property?

Does this individual have a different personality or behaviors at home (or when you are alone) versus in front of others? 

In conversations does this individual manage to direct the topic back to themselves often?

 Is this individual extremely sensitive to any kind of criticism or feedback whether constructive or not?

Is this individual highly critical, difficult, and hard to please?

Has this individual been loving and kind one moment and then withholding and cruel the next?

Does this individual seem to lie or make up stories frequently?

When you confront this individual about harmful actions do they become blaming, abusive, and twist your words until you're so confused you give up?

Do you notice this individual does not want to follow rules or respect anyone's boundaries? (especially yours.)

Does this individual seem to feel entitled to your time, energy, attention and other forms of resources?

Does this individual have a need for control in every situation?

Does this individual tend to exaggerate their achievements and even try to take credit for yours?

Has this person tried to discredit you to others by lying or sharing information that was supposed to be private?