I am sort of in the same boat as you are, although the reasons that I'm having trouble with the wedding are a little different. I wish I could offer you advice on how to get through it.

I am just soldiering on. I have accepted that it is mostly for my fiance and his family that I am doing this (although I'm sure that I will be less accepting of my impending public humiliation once I am a little closer to the date). Good luck with yours.