I’ve been told by plenty of people that I’m boring, both when I was trying to be social and minding my own business where they just happened to be hanging out.
Sometimes it has bothered me, the feeling I have little to offer in a friendship I mean, but generally I think it’s actually kind of rude to tell others they’re boring, when there’s no opinion being sought (or offered lol). It’s a lot easier to feel social/not boring if you can find someone with a lot of similar interests - even better if they have others and you get curious enough to ask about them!
I’ve definitely been through the whispering/being shut out of conversations thing, it’s so nasty and even kind of childish to do.