i was the worst neet during middle school, never went out and basically spent all my free time at home watching anime
one day i kinda just realized that i wanted to be more 'accepted' and to fit in with others, so i called old friends, went out, made an effort to be nice, smiled all the time and put some effort into my looks.
i'm definitely not a stacy lol, but at least i have a decent amount of friends and get along well with a lot of people. don't wanna go back to my neet life. i'm still kinda introverted but i really push myself to do stuff with others and end up enjoying it a lot!
but honestly, exercising, taking care of myself and changing my mindset helped me the most. just smile at people, try to be more cheerful it automatically makes you a lot more approachable and people will want to hang with you!