When I started a new job 12 years ago, I gradually became very friendly with one of my colleagues, to the extent that I would call her my best friend. We've shared confidences, socialised with family and so on. Over the last year however, she's being acting as if she finds me irritating. She's become very friendly with another woman at work and I've felt quite excluded. I know that I am a very oversensitive person and a worrier, and she knows this too, but they have been ganging up on me and making snide remarks, all with a smile! She is critical of the fact that I avoid confrontation and implies that I sit on the fence and try to please everyone. True! I know she is a little jealous of my personal circumstances. How can i stand up to her and retain the friendship, on a more equal footing? It's like being back in the playground!