Post-college, much of my social life involved friends from college with some similar interests, passions, hobbies, etc.
Over time, my wife and I married, we made new friends and have kept in touch with the old.
But when we moved away from our college's town, we realized that perhaps we fooled ourselves in to thinking that our liberal arts college was so diverse.
Even though you had business majors and art majors and students from all over the country and the world, there were some major unification points: everyone was pursuing higher education, everyone was relatively the same age, everyone had enough money to at least get a loan from a bank to go to colleg,e and everyone chose to go to school where we were.
Yet now that time has passed we're struck with the reality of how significant those collegiate-similarities are.
In college you're living with different people in tight quarters, primarily coming out of similar experiences with similar connecting points. Even if initial discussions are about previous high-school extra-curriculars (sports, clubs, band, etc.) or you're discussing your past (family, pets, hometown) there is a natural connection point. And sure you're hometown might have been small or big, or your football team was good or bad, then general and initial topics of connection have the potential to be similar.
Establishing community out of college is challenging. My wife and I have had an exceptional opportunities since we've moved to form community with others through finding a church and developing relationships in a small group, but the relational connection points are more challenging then a collegiate setting.
Suddenly you're dealing with married people, single people, people with various educational experiences, goals, and pasts.
Even the desire for relationships is different. Some people long for deep relationships, other for a wide variety of friends, some prefer networking, while others are happy with the relationships they have, or simply don't desire many relationships at all.
While it is sometimes hard to develop meaningful relationships in college, forming deep relationships post-college is an even more challenging thing. My wife and I have been fortunate to begin some relationships with new friends post-college, but even as I talk to other college friends of mine the experience is often challenging.
It's strange. I think we all have an innate need for community and relationships with others, yet its often hard to determine why this is such a challenging need to meet.