It sounds like it is a mixture of things. Just from what you've described, I wouldn't go as far as to label them as narcissistic (MAYBE your dad a little, but I don't get that from your mom's description so much). It sounds like stress and loneliness took its toll on them both and that after they separated, you became the one they talked to. But because they were stressed, this came out one sided. If they had both been in happier relationships, you likely would not have taken on the role of "listener" so much. Narcissism is an ingrained personality trait pervasive in relationships with all people. The question to ask yourself is how your parents related to people other than you. It sounds also like you have taken on a lot of responsibility for your dad and in doing so are in danger or becoming dependent on him financially, which can feel a bit like a prison. Perhaps a roommate? I am sorry about your mother, that must be tough