DEAR MISS MANNERS: For the last 12 years, I’ve worked as a member of a tight-knit office within a much bigger organization. My co-workers have been here even longer.

We know each other well because we have to travel together often, but don’t typically socialize outside of work (we’re together enough already!). I’ve been to a few graduation parties and a funeral, but generally don’t interact with my co-workers’ families much.

My oldest child is getting married, and we’re finalizing the guest list. I’m hesitating about who, if anyone, to invite from work. I think my director would genuinely like to attend, but am not sure about the other project manager, or my closest collaborator, whom I technically supervise.

Should I treat this as an all-or-nothing situation, like grade school birthda

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