They do. While you were learning whatever you spent the last 18 years learning, they were learning the social hierarchy game. Most people, even here, don’t like breaking the taboo of acknowledging that we’re an hierarchical species, which is why there are so many seemingly unwritten rules. Robert Cialdini and Robert Greene are a couple good authors to look at. The latter basically makes his living writing down unwritten rules.
My guess is you don’t have much of a problem getting along with other young men who share your interests. I’m probably wrong, but I’m hearing “how do I get a girlfriend?” That’s a complex subject and many books have been written on the subject going back millennia[1]. As with most everything, one good way to learn is to make friends with someone who is successful at it and watch and learn. Essentially it boils down to practicing the art of persuasion, which assuredly can be learned. Practice, practice, practice. Learn to thrive on rejection and take it with a grin.
Oh, and don’t be annoying. Learn the social cues people give for annoyance and the moment you see them stop whatever annoying thing you were doing. If your mere presence is annoying then as others have suggested, work on your hygiene and appearance first.