Hi,
I have had two recent occasions where I mentioned wedding planning via social media and two individuals assumed they were invited. I contacted them and politely informed them it was for close family and friends. Both my fiancee and I have large immediate families and family friends. We are tapped out on our guest list and I think she understood was was this okay? I only worked with the people for a few months and don't talk to them other than sparingly on social media.