Until 6 months ago, was living with exDP in a block of flats. We've always had trouble with one of our neighbours, uses our bins, parking space etc.
When exDP and I split up, we didn't tell anyone in the building (6 flats in all). He quietly moved out and we have remained friends.
Today, I got an anonymous letter saying that my "affair" was common knowledge and that if I didn't stop "cheating" on my partner, that they would tell him!
Yes, I have been dating. And yes, he has stayed over a few times. But even if I was having an affair, AIBU in thinking it would still be a really shitty letter to receive?
I have no proof of who has sent this letter. But I'm assuming it's the troublesome neighbour as I do get on with everyone else in the building.
Also, even though ex and I are no longer in a relationship, AIBU in thinking it's up to ME to decide what and when to let him know I'm dating again?