You meet an awfully huge number of people, simply because everyone knows everyone. You know names and faces, you 'hang out' and have endless dinners and coffees. But how much do you actually expose yourself to others? What are they most probably lying to you about, and to what extent are you yourself being honest?
Putting aside the gender barriers, and assuming that girls or boys can be satisfied with having platonic relationships with similar sexes only.
What is that social component that makes everyone a clone, a copy of one another? Why should you know more about the person in front of you - you'll only discover vulnerabilities that most definitely replicate in your character as well. And that is a painful way of living.
I am, of course, horribly generalizing, and talking from only personal experiences.
But, here, being friends with someone is like walking on eggs. You have to be so cautious, non-critical, and just pleasant and fun. Friends do not hold themselves as mirrors to each other here, but self-portraits that are but the exact portrayal of the friend - but never the real reflection.
Perhaps this is an honest cry for identity?
Or perhaps this is just the case everywhere?