I work at the same place as DH. We were out on Friday night for a work social and I was chatting to some colleagues who I don't know that well. The conversation got onto an ex colleague of ours who left a little while ago. One of the women commented to me "I bet you're glad she's left!". I questioned why this would be, and the women looked awkward, and then said, because of how she was with DH. They then went on to tell me that they thought it was common knowledge that she really fancied him, and that she used to be quite inappropriate with him including sending texts coming onto him. I had no idea about this.
I asked DH and he admitted that it was all true, but he didn't tell me because he knew how upset and angry I would be, he thought it would make it awkward at work for me and her, and there was never anything in it for him so what would be the point of upsetting me.
I feel really mortified that lots of people at our work knew about this and I didn't. AIBU?