I spent 6 years in a job, lunched with the same few colleagues most days, thought they were good friends, knew their partners, met up out of work, that kind of thing. Left to start own business ... None of them offered any support, nor visited, nor anything. Completely floored me, I thought I had good friends at work.

One colleague, a very loose acquaintance, visited a couple of times, asked after us; I need to find that person and thank them ... [people I knew through a club, who happened to work in the same place continued to be friends however.]

Anyway, I'm now working with some of those people again, and talking with them it feels like they're friends... but in retrospect I think for them I was just like background noise to their jobs?

So, at least for me "carry on being friends" was the expectation but I was miles off.