DP and I met a few years ago in work. Whilst I worked there I encountered a woman who was vile. She spread nasty rumours, made unfounded malicious complaints etc.
Fast forward a few years later and DP has gone and added her as a friend on facebook.
He and I no longer work there and have no mutual friends with this woman. DP and the woman in question were not even good friends when we all worked there in the first instance.
I know it's only facebook, but to add insult to injury he's very selective about who he adds so it just feels slightly disloyal to me.
AIBU? probably, but I would appreiciate others opinions.