How Do You Become a Part of a Friendship Group?

Even in college, a lot of my college friends were introduced to our friend group because we would metup. So now nowadays, whenever we go out, like s f or s j, we just invite both groups, or whoever we can find. The ones who aren't coming are the only ones i have on my top texts. In different friend groups you might be like the bystander, right? Yes? No. Omya, jesus is literally calling me. Loni gasoing. And then i'll open up my text and i'll be like, a caonme. Just scroll tonso tito, like, who is my friend? My go, shit