Why do I lie so much about myself ? About my life ? Why do I fake about my life and myself ?

I lie a lot because I feel insecure and I have a habit to be in a lead/excel in all fields of life.And if someone else is more successful than me , I try to lie about my ACHIEVEMENTS.I remember when I was 18 , I lied so well to my friend that he believed that I work for investigative agency like CIA [Just an example].And till this day I am lying more to support this lie.This makes me feel very superior but at the same time sick of myself.I even lied that I work for a research project under a very influential professor in a reputed University, made certain fake documents to support that.I dunno, you may think I'm a weirdo, but this is a genuine problem.Like the above two examples I have many more lies, all of them are of huge scale.MY QUESTION IS WHAT WILL HAPPEN TO ME IF I STOP LYING.I MEAN WHAT WILL PEOPLE THINK OF ME WHEN I STOP TO LIE AND WHEN PEOPLE HEAR THAT MY LIFE IS NOW A VERY ORDINARY LIFE UNLIKE A SUPERIOR ONE WHEN I WAS LYING ? Please help for genuine answers.You can even mail me up.Thank you.