Unfortunately I have a few of these :
Best friend - suddenly stopped talking to me for no reason. I found out by looking at my husbands phone (20 years married), that they were shagging (Yes, I ditched them both).
Friend of 10 years - raging alcoholic, accused me of sleeping with her very overweight and ugly DH, just because I agreed with him that she shouldn't be caring for their child when she was so drunk. That was the last straw!
Friend of about a year - on a night out, a man she fancied slipped his business card into my pocket (I had no clue), so she physically attacked me, punched me in the chest and then started stalking me.
These are the three I ditched.
Sadly, my other 3 close friends have all let me down. When I left the cheating husband, not one of my friends called me to see what was going on. Not ONE call from anyone. Of those 3 friends, I have a favourite. She's extremely wealthy, yet my birthday and Christmas presents are always recycled shite or freebies she's had with a beauty product. It's all very obvious.
I do have other friends, one's I made when I moved to a new town a decade ago, but I'll never fully trust someone again. I was so invested in my friendships when I was in my 20's and 30's. Age 55 me is much wiser and more cautious. It's a shame really. But when the chips are down, most people are such a disappointment.