I found out 2 years ago that my longterm partner had embarked upon an emotional affair, crossing several lines. My BPD was at that point undiagnosed and things were very very hard between us, with counselling we have tried to move forward. Good days and bad days - he did a foolish thing and the sense of betrayal may never go away but I am committed to moving on if we can. We are happy much of the time and I love him still.
The OW was a very close friend of myself, DP and my extended family. Think godparents to each other children, holidays together etc. My sister has stayed friends with her - her statement being that the OW was like her other sister for years (true) and in forgiving my DP for his actions, she forgives her too. I am not willing to do that nor do I think that the OW is especially sorry but (even though it hurt) I never reproached my sister, how could I? My decisions are mine and hers are hers. She felt as betrayed as I did I think
Now for the WWYD - my sister wants me to be her bridesmaid and the OW will be at the wedding. I suspect that I will have to be on the Hen Do with her and I know for a fact that the OWs son will be a page boy. My sisters wedding is not about me nor do I want it to be but to sit in the same room as her and my DP might be too much to bear.
Advice please?