I'm not the OP and I've never posted anything like this, but I don't mind this sort of secret, either. Maybe that was a fandom they shared, or maybe that's just the best analogy the OP has to express just what the dissolution of their friendship felt like to them. I mean, it's not like you can generally go up to someone IRL and say "Heather and I are done. Now I know just how Professor X felt when he broke things off with Magneto."