| I am one of these friendly extroverts. Something that's hard for me to explain is that "making friends is so hard it's easy" What I mean by that is, social anxiety is so high, population-level self-absorption is so high, people are so lonely... that for the most part if you just approach someone and behave as if you're friends... they'll go for it. There's so much DEMAND for friends, that people will gobble up your supply if you offer it (so long as you're not a total monster) |
This really doesn't ring true outside of school/university years. Back then, you are constantly meeting new people, and seeing them regularly in class and on campus. People that age don't have a "max occupancy" number when it comes to making friends. As an adult in the working world, the opposite is true.
Outside of that uni environment, a new person is going to have to knock your socks off with their personality, for you to even consider meeting up with them again. Most people cannot make a first impression that good.
Outside of school/uni, people are busy with daily life, and far less likely to chat with strangers. Friendship groups begin to quickly narrow around this time as well, as people get married, go to professional schooling of some kind, and start hanging out mostly with people that are very similar to them.