FONBI
FEAR OF NOT BEING INVITED - Similar to FOMO, but it is the fear of not being invited to an event or a gathering. Many people won't mind as much missing out, as long as they were invited in the first place.
When I couldn't make it to the best birthday party of the year due to a prior engagement, I didn't get FONBI and didn't mind missing out on all the fun because at least I was invited to the party .