Psychology behind chronic lying? Answer preferably in 1 sentence.

[Absurditymaxxer]

I used to chronically lie 24/7 left and right in highschool to make my self seem way more cooler than I actually am. Even when I am alone, I do this constantly and try to give myself the impression that I'm much more interesting than I actually am ( reflected in the way I write and do most things )

 

[Schizotypalcel]

you used to fabricate stories and exaggerate aspects of yourself, both to others and to yourself, to appear more interesting then you felt you really were maybe.