I was lonely, enjoyed a regular dog walk and a breakfast with another lonely school mum. We shared a few quirky interests. My DD had an autism diagnosis and since her DD was on the waiting list, took her as my plus one on courses, meetings etc.
The friendship became unbalanced, I realised she coverted 'stuff' and always had to have the best chicken coop/car/bell tent. She'd be flattered then disparaging if anyone duplicated, offended if you didn't.
The walks became all about me listening, her offloading, no interest in any aspect of my life - career, health, children or garden. Just literally hours on hers.
The final, final straw was hearing about her 15year old US honeymoon again when I'd just got back from the states and utter failure to ask about that or a very visible, serious, health issue.
A few months earlier they'd pressed on me their spare car when ours was absent for 24hours. The Husband claimed I'd scratched the hatchback cill and insisted the panel was resprayed not even attempted a tcut and polish (I'm in the trade, he's admin for a cushion company) It was exactly where their portly dog scrambled into the car. Cost £150 , on a 14 year old car. Seemed worth it to walk away without local gossip following me forever.
I often see stuff I know she'd love and genuinely care how her troubled DD is doing but I never contact now because it was only a friendship for me for a season, while I was useful to her for a reason.