You just have to make yourself be noticeable on a positive way, you should think that other people have the idea that you might be very introvert so they won't bother asking when they always expect a no, which'll make the question of "hey wassup bruh, wanna go to this sick party with the bros?" be a rude question to them because they think of you as a lonely person for whatever personal reason, in their mind they probably think of the introvert as the guy who is probably heartbroken and needs some time alone, it just seems to be like going to a funeral just to invite the dude who lost someone into some hot happy time party, that's disrespectful and if people don't ask invite you to something because they're assuming this might be because you haven't made yourself be noticeable, as in, people don't know if you're actually a partyman. You just need to be noticed really.
