person A: It really irritates me when my friend acts superior to everyone in the room_comma_ since he seems to think he is the best looking and strongest guy ever when really he's not at all.
person B: That's usually a sign of a lack of confidence or self esteem  in ones self I believe. 
person A: That wouldn't surprise me. He has always been a bit insecure.
person B: I hope you he changes some so you can still be friends. 