I fell in love with my best friend's husband. We carried on a short but beautiful relationship before agreeing to stop. I have suffered so much shame over this that I still haven't allowed myself to grieve the loss. What we had felt like magic. I have never felt so seen, heard, understood, and loved just as I am. We stopped because we couldn't continue, we knew it could only end badly. We did not want to wreck his home. He was unhappy but still loved her, and I did not want to hurt her either. As far as we know she has no idea, and he and I are back to being friends. I feel sad to have fucked up like that, I feel like a sick monster. I am also scared I will never find another partner like him.