I didn’t truly realize this until after I was laid off from Former Employer. The woman whom I considered my BFF there? Haven’t seen her in years, even though we were very close as in getting-together-outside-of-work-a-few-times-a-week. I babysat her kids so she and her husband could have a night out. I once saved her son from a riptide. I don’t even know if she’s still with Former Employer.
I get along just fine with my current coworkers. It’s just that I’m old enough to be their mother; ergo that age difference sort of makes it awkward.