Yeah, after you’re out of school it becomes really difficult to make friends (especially as someone who’s different), but it does happen eventually be it due to changing jobs and what not. Until then, you kinda have to rely on online friends for socializing so you don’t go Insane.
Also, dunno what you’re like IRL but it’s possible the issue could stem from you, it’s something you have to look into how you act yourself and see how you come off. Maybe you’re acting in a way that’s too unapproachable, and is there any way you can change that?
If theres any tips I could give you, it’d be practice small talk with coworkers if you get the chance to maintain social skills, change jobs once you’re able every once in a while to also change the people.
You’re still like 20, you still have 8+ years of your youth remaining so there’s time.
In that case, the best play is probably to practice speaking to others at work, even if it’s cringe or small amounts. How would one even go about making friends by constantly being mute? There’s no cheat code for speech, and it’s especially important for (ex-)shut-ins, as social skills such as speech are kind of a muscle that can atrophy, which is where many problems come from.
Btw speaking of exhaustion issues, are you eating enough? I had a similar issue myself where I’d be exhausted after shift, with hardly enough time to recover my muscles and energy and it got fixed after I stopped skipping lunch and just ate more nutritious meals. If that’s the case for you, maybe this could give you enough energy to get stuff done after work and on weekends such as finding groups of people in communities that interest you? It’s also a very much viable alternative if you can’t find anyone at your job.