@Oyetessa The older you get, the fewer close friends maintained unless you stay stuck.

The older you get, the less tolerant you become of other peoples' bullshit, so bad friendships are jettisoned, plus people get married, have kids, move for their careers, and distance and different life-paths weaken bonds.

When you are very young, friendships are easy: "You like Batman? I like Batman too. " You're friends. Later on you discover liking Batman is not the basis for a good friendship.