That’s my experience and advice too. I just naturally find friends that are on average 15 years younger than me. I’m early 50s and most friends are mid-30s. Working at a university for years sort of established that pattern and it has remained even though i went corporate.
I mean, have you met US Americans in their 50s? For me it’s the lack of imagination they tend to exhibit. I’m a perpetual child myself, no kids, no plans or desire for any. Younger friends have interests and dreams, still. I do too!
I find the quiet desperation that oozes from people in my age cohort to be off putting. If you are desperate, stop being quiet about it!
Having younger friends keeps me optimistic because younger generations seem to have looked behind the curtain and have partially deconstructed the illusions we are ruled by. Maybe there’s hope?