Wow I'm so sorry that people have been treated so poorly by somebody they trusted. These stories are horrifying. Makes me glad I don't have a bestie.
I will openly admit I was not a great friend as a teenage girl, I am quite horrified by my behaviour looking back. Nothing extremely bad, just typical catty and back stabbing behaviour I think our group of friends were guilty of and our relationships were quite toxic. We all lost touch pretty quickly after highschool going our separate ways.
Since then I think it's more I don't trust myself to have close girlfriends again. I have a few guy friends that I share with DH and to be honest having male friends is a lot less complicated, but I don't have anyone I could call a bestie or anything.
I had no bridesmaids or maid of honour at my wedding because I simply had nobody to ask.
I did think I had found a nice bunch of women at work to call friends but I discovered when I was on maternity leave that nobody made the effort to catch up that they were just friends of convenience rather than true friends.
I do get sad at times (and DH is sad for me) that I have nobody to have a girls nights out with but at least I have DH and his mates (we all went to high school together) to keep me company.
I am unable to use Facebook as when I joined briefly and starting receiving friend requests from girls I hadn't spoken to in years I just found it too upsetting and deactivated my account after a day.