This Kinugasa. Welcome to the class of excellence (№ 414672)

I wonder what the word "be friends" means? Where the hell are these friends coming from? Maybe people become friends at lunch together? Or after a trip to onsen? The more I think about it, the less I understand. Is that something complicated? More thoughts need to be made.
Trying to make friends is stressful and very tiring. For starters, should I try to make friends with someone? Moreover, doesn't friendship form itself over time?