My fiance and I are friends with a guy who was in a serious and long term relationship (before we became friends with him). We of course invited he and the GF (via save the date) although the GF has really only ever been an acquaintance, and I wouldn't say that we have ever been close with her. They recently went through a sudden and very unexpected break up. In a private conversation, my Fi and I decided we probably wouldn't put her name on the invite. She recently send me a facebook message asking if she was still invited to the wedding. She continued that our friend, her ex, might have to work the weekend of our wedding, so it most likely would have been only her attending anyway. She went on to say that if I was worried about it being awkward, she could assure me it wouldn't be.
We simply just did not plan to invite her anymore since we aren't very close to her. Should we invite her? I'm mostly flabbergasted that she asked, in my opinion she has made the situation awkward by even asking. The few friends that I have shared this with agree with me and my fiance, but I wanted to get the opinion of other brides!