It's good to hear your parents are cool and you don't have a toxic roommate. Toxic people made me misanthropic and agoraphobic for a while. Also good that you've got mobility in your city.
Try things you wouldn't normally try and if you hate those things it doesn't matter but you might luck out and find something you like, just don't get self destructive on this quest.
If you try online dating, okcupid or whatever, be brutally honest about yourself. I had on my profile that I was broke, just lost my job, apartment full of hoarded up art supplies and wacky crap, didn't own a bed because I sleep in a floor nest, diagnosed ADHD, uses an ungodly amount of medical marijuana, seriously non-negotiably allergic to cats, sad about dead dad (cancer), angry at abusive mom (lives far away), mildly racist against Apple products (at least that's not people). I was a real bag of crazy and still am, but someone cool found me and we've been together for 2 years. He's not the first person I met, just the best. The greatest gift he gives me is not giving shit for my problems.
Now he and I are sort of in the problem you described. We had a weekly DnD game but it's starting to fizzle out. Possibly because we were spartan about refreshments a few times or because of coincidences. I tried to make the apartment as comfortable as possible for others but problems I never anticipated would happen, like a player (who's one of my dude's coworkers) wanted a painkiller but all I have is assorted marijuanas. I had to dig around the apartment to find some ancient aspirin. I sometimes I have a difficult time finding people who want to still be friends once they find out I'm not single and not looking and really just want friends. Clear intentions are always cool. If someone responds negatively or rejects you, they're really just getting out of your way on your journey to find actually cool people.
Sometimes people are more willing to hang out if there's a set end time, "I gotta leave at 5 but do you wanna hang out before then" just don't use it as a trick, leave when you say you will. People hate to be manipulated.
Make friends with yourself. Not always easy I know, my mom trained me to hate myself. My life was exactly like this Hyperbole and a Half comic, it took me a few years to get out of the state of flopping around my apartment while bullying myself.
Things can get better, appreciate the progress you've made, don't add to your problems by giving yourself a hard time about not already being perfect.
MtG gets cool then lame then cool then lame then cool then lame. It's also an ongoing work in progress and a collaborative creation prone to all the ups and downs of things of that nature.
A secret of life my Dad told me was, "No one else really knows what they're doing, they're all just sort of winging it".