There are a few types of people that you should never regard as your friends. It does not mean that they are bad. It does not mean you should avoid them either. But calling people from the list below your friend would be a mistake.
These people do not care how you feel and what matters to you. They might listen to your concerns for a few minutes. However, they will soon change the topic and start talking about themselves. They will do all possible to switch your attention from your issues to their problems. Egomaniacs do not believe that there are people who would be more important than they. You will never get any support or understanding from them.