What is up with me??

Hey so im 21 and just need a little advice. Ive realised im either really lazy, depressed, or ill in some way but cant figure out which. I work 5 days a week as a waiter at a family restaurant. I wasnt able to go to college after high school due to the fallout of a rather dysfunctional family i grew up in, yet at the same time i never had much intrest in a career at the time as well. I now live on my own, dont have really any family members other than a younger brother i speak to on weekends over the phone and have a friends over a couple nights a week. The thing is i am shy and now that i live on my own without any contact with family i feel ive lost my sense of direction in life. Looking for a new full time job seems difficult and beyond time consuming and it deters me from even thinking about it. I sleep in till noon everyday and then either sit on the computer or play video games all day till work and then continue with it when i get home and i seem to do this everyday in and out. I rarely meet girls at work and even when i do i find it such a hle to get to know them better and go out with them that i end up making excuses and lose my chance. I just seem to have excuses for everything and cant tell which are viable and which are me being lazy. I feel almost stuck in the position im in as i cant afford to keep a car on the road with my income, im insecure and overthink everything it seems. So whats the deal? I cant tell if im over thinking everything and need to accept that im a bit of a loner, if perhaps im depressed, or that this is just who i am and everything will fall into place with time. Its driving me nuts, i just wanna feel like an equal to others and not someone who is bound to remain lonely and unaccomplished. Any insightful input is appreciated thanks!!