Another one for the 'got a boyfriend'
We had been friends and near neighbours for over ten years. Kids played together, shared holidays together and lived in each others houses. Never had a harsh word or argument.
I think she got very used to me being the hardworking, poor, lonely single mum that she could feel a tiny bit superior over and couldn't cope when that very set idea of me changed.
When I got a casual guy she acted like I had broken the ironclad rules of our relationship dynamic. She got this intense super weird low burn angry thing going on.
When that didn't do the trick she got quite mean and started subtly picking at me with a passive aggressive conversations about mutton dressed as lamb, how men like desperate single mums because they are easy and so on. (I should mention the guy and I were both were super casual and laid back so no one was taking advantage of anyone)
She popped round early one Sunday morning to suggest a trip to the seaside and for some reason thought he was asleep upstairs (he was not). She just flipped, screaming at me unintelligibly and never spoke to me again.
It was plain weird.