4 of us have been friends for over 30 years.
Friend A is single, the rest of us in relationships. She has always said things like "well, at least you're married" and "you wouldn't have a car/house/holiday if you weren't married".
She has a reputation for ' losing it' over percieved sleights. This means you kind of walk on eggshells around her. Also, have to listen to her go on and on about these sleights from other people.
I started to cool off from her about 8 years ago when she became friends on facebook with my ex. He had hurt me very badly and , looking back, was verging on abusive toards me