This is going to seem like some teenage drama but actually we are 3 women in our 30s. My closest friend is A but her best friend is B. B is someone I don't really have anything in common with but until recently I tried to get on with B because the 3 of us socialised together quite often.
About 3 months ago I was going through a very stressful time. B and I both cope with stress in different ways (I'm an introvert and B is very extroverted) and I became aware that B was saying negative stuff to A about how I was dealing with the situation. To avoid any confrontation I tried to keep out of B's way for a while.
Eventually A noticed that I seemed to be avoiding B so I sent B a message saying sorry if I'd been off but I was going through a tough time. The message I got back was basically that B had decided that we weren't friends anymore. Now A+B get together and I'm left with the scraps of A's free time. I've also noticed that A is becoming increasingly untrusting of me, which makes me think that B is saying things about me behind my back. I've tried to ask A about this sudden lack of trust but she just avoids the issue.
I'm not very good at making friends and am upset that I seem to be losing my best friend (A) because B has decided she doesn't like me anymore. I don't have any contact with B as A is our only link but I would try and be nice to her if we met. I just don't get invited out with them anymore. I don't know how to resolve this situation so that I get my best friend back, or at least regain her trust.