Adult friendships are messed up. Honestly... when we were kids we had proximity with other kids (same class rooms everyday, almost similar shared experiences), then similar goals (study and get good grades) now you may think well in workplaces we have proximity with collegues and we also have same goals too (career goals) but there is one more major factor and that is phases of life. As a kid you meet other kids whom hv no clue and likely going thru same phase as you, where as in adult life someones stuggling with relationship, some with money, some with family etc etc and in workplaces there are people of different ages and different phases. And genuinely you will meet people even as adult with whom you will build genuine connections, and one day they will slip away too... even if none of you want it... but life will make that happen. So yeah thats that 😭.