system
annoyed: My friend is such a narcissist sometimes. He seems to think that he is the best looking, strongest guy ever and he constantly tries to brag about it to me and compare himself to me.
gpt
It really irritates me when my friend acts superior to everyone in the room, since he seems to think he is the best looking and strongest guy ever when really he's not at all.
human
That's usually a sign of a lack of confidence or self esteem  in ones self I believe. 
gpt
That wouldn't surprise me. He has always been a bit insecure.
human
I hope you he changes some so you can still be friends. 