I’m talking more about female friend groups but I guess there’s no reason this can’t apply to male and mixed groups.
But there are certain things that are sort of ‘understood’ but not spoken out loud iyswim?
The minute you’re perceived to ‘break’ one of these unwritten rules it changes your dynamic with the rest of the group?
EXAMPLE: I was friends with a lot of very middle class people in school whose parents and themselves were university educated but also very left wing anti Thatcher type people.
However, when at age 18 I got with a working class bloke from a rough council estate who had uneducated parents and had left a rough school with 2 CSEs, then went to live with him in a council flat as a teenager the disbelief and horror on their faces was palpable.
When one of my middle class daughters of teacher friends went to college in a working class area one of the other girls in the group said something to her along the lines of
“you’re not going to socialise with THEM are you?” (meaning kids from working class area)
Well for what it’s worth - I’ve spent all my adult life mixing with THEM (working class people!!), lived on a council estate, been welcomed as part of my ex partner’s working class family, our holidays have been AI 3 Star Benidorm hotels (think a ‘Phoenix Nights demographic!), plenty of bingo, soaps etc and I’ve loved it all !!
But I got edged out of my school friendship group. But it’s been a small price to pay as I always hated the demographic of my school and never fitted in - way before I met my ex.
So AIBU to think there are ‘unwritten’ rules about different kinds of friend groups - break these rules and it causes problems !!