So a bit of background, DP and I don't live together at the moment, I am out of the UK for 6 months with work.
About 2 years ago DP was close friends with a woman at his work. She was always very rude to me but he always made excuses for her behaviour. Anyway it turned out they were sending very flirty emails etc to one another. I was absolutely gutted, not only because of the messages but because I couldn't believe he had made excuses for her rude behaviour towards me when actually that was the tip of the iceberg really.
I asked DP to stop meeting the woman socially. I would never normally put limits on who he can and can't be friends with but in this instance I personally felt it was fair.
A few weeks ago he went on a work night out, and she was there. Fair enough I thought, they all work together.
However two nights ago he went out again with another woman from work and this first woman.
I personally feel annoyed that he would go out with her in this kind of social situation. I feel like he is becoming friends with her again and I don't think that is right.
AIBU in being annoyed? He thinks it is all water under the bridge because it happened two years ago.