I ruined my whole life

Idk if anyone else here can relate but I 21/male completely wasted the past 3 years sitting all alone in my room and essentially I wasted my whole life.

I spent my whole life overthinking every little mistake I made and compulsively trying to control things as I feel like I'm fundamentally incapable of living life.

My life can be summarized by having regrets, disappointments and feeling powerless.

All my hopes and dreams got crushed. And I missed out on everything.

I ruined my life and feel defeated. The worst thing is that I don't even have anyone to talk to and feel so lonely.