I can certainly relate to you because I also feel like I wasted most of my life due to my introversion and my plethora of other issues.

I'm 25 yet I've never had a serious relationship with a girl, never been to a party, never had a regular 9-5 job because of my mental health issues and mostly got by via self employment and occasional odd jobs and contract work, and I've never had any "normal" friendships. Heck, I never even got my driver's license or got to go to a prom or anything during my high school days because I couldn't even function in high school.

All I've ever had to keep me happy is my games, anime, fictional books/shows, and music.

I don't know what else to say