

It can also backfire if the other players decide they like them more than you, so they refuse to join the new campaign since the removed player isn’t there. You could lie and tell them the removed player just decided to back out, but since the players like each other, it won’t be long until they start asking why they left, and then everyone knows the truth.

Hey, I play in D&D games without my bestie no problem. However, I don’t play in D&D games with people who gaslight my bestie in an attempt to ostracise them. If you didn’t do that, I wouldn’t have left.
I’d say that trying to push someone out of the group, then getting kicked out of the group yourself, is a bit of a backfire.