[thelettere]

Not sure why this is downvoted. It is well documented that the most demanding activities lead to the strongest and most enduring relationships. War is the most extreme obvious example, but at college students who participate in demanding sports or band or those competitive business groups have far richer social lives in general than those who join casual clubs. In adulthood careers like medicine where people do gruelling shift work together results in again in more enduring and close bonds than in your usual 9 to 5.

It is perhaps an inconvenient truth but share suffering and struggle is the "secret" here. Why do you think childhood friendships are generally the closest ones a person will have? In part because of the intense earnest struggle to figure things out. Which is what brings people together far more effectively than shared happiness or some vague feeling of social dissatisfaction.