Does a bad person ask the question, "Am I a good person?" I would say that most of them do not. They are most likely set in their ways, and cannot be persuaded to see it any other way. I think if you really do consider the question above, then that is a question that a good person would ask.

I don't think the majority of the people in history we see as good sat down everyday, and thought, "Man I'm a good person". I would think they would sit down and think, "How can I fix this problem, How can I be better, and how can I treat my fellow people better".

If you feel that you have truly wronged someone. Then the best thing to do is apologize even if they do not accept. It is better to say I'm sorry then simply ignore the feelings about what you have done.