My best friend of 20 years went a bit funny after the birth of her 3rd kid and decided/believed that I had mortally offended her. She didn't say anything at the time but about a month later I had a call from my oldest friend asking, "Did I want to share a taxi on Friday?" A taxi to where? I asked. "Sarah's wedding?" he replied... and then I realised that she had not invited me to her second wedding. You should probably know that I was her chief bridesmaid first time. She unfriended my other half and my family from Facebook, told her kids they couldn't play with my daughter and then started spreading rumours... yeah. Total cut off, vicious aftertaste - and without an argument. I was gobsmacked.
You think you know someone, and that they know you.
She came back, 5 years later. Her mother was dying and she was having a hard time at home, the newest kid has autism... tears... the good old days... and I was polite but I thought, Why are you telling me this? You have friends and family who can share your burdens. I owe you nothing. Once bitten, twice shy.
Friendship is not like a tap, to be turned off and on.
I did ask to see her mum again but what with Covid it never quite happened.