Lack of drive and motivation

I feel like I'm slowly losing my grip on reality. I made a big life changing decision that I was certain would improve my quality of life, which it did, but I'm back at the same dead end. I don't care about anything. I like being with friends but I have so much social anxiety that I refuse to go to parties and such. I'm scraping by in school because my parents are paying for it and hopefully I'll be able to support myself - but other than that I have no goals, no motivation, and no feelings of self importance or worth. Sometimes I joke that I only get one life and I'm wasting it away playing video games and sulking but that seems to be the bitter truth