They're Always the Life of the Party
They love to be the center of attention all of the time. They're attractive, funny, have a relaxed attitude, they can be charming, charismatic, and tend to make people feel special about themselves. Your friends and family are likely to find them to be a great match for you, and will also fall into the trap easily.
Once you really get to know a psychopath, though, you will realize that this is all an act of arrogance. They think and act like they're the bees knees, the coolest, smartest person alive, and try to make everyone aware of it. They will rub their successes in the faces of others, and put others down. They will tell you how amazing they are and tell you how "lucky you are to be with them." Don’t fall for this trap. If they are always thinking they are better than everyone else, it might be a sign they are a psychopath.