Same as an earlier poster, a married friend stopped coming out every now and then as she was having an affair with a fellow from our work but telling her hubby she was out with me.
I sucked that up for a while until they were ''outed'' at work, and then the fellow pointed the finger at me saying I had told people about them being together when in fact her very distinguished car and his truck were often seen parked up together at the local (to work) park for long periods of time.
My best friend from school hooked up with a married man who moved her into his holiday house 4 hours away. I was never invited to visit, and rarely contacted, so I guess you could say she dropped me.
Prior to that we had shared my Gran's house and she had a BF visiting however later gossip was I was sleeping with my BF at the time as well as her BF from the same period. A 2nd friend from school would also come and go while giving out my Gran's landline.
The people spreading the gossip had no direct connection to my life at the time and it was all just hearsay, but both school friends were long gone from the area when I was left to deal with the fallout and I could have done with their support. My Gran returned to her house and was receiving male visitors who were apparently looking for me hearing I was up for a good time. :(
So by my mid twenties I just couldn't be bothered again to try friendships for a long while.
I'm much older now, and have one older friend and we check in with each other once a month or so. It's probably fair to say I have a distrust element going on as I felt let down by my earlier friends and I just cannot be arsed to go through that again.
I also feel perhaps I have a ''bum'' detector when picking friends too!