I think given the opportunity to sit and have a conversation like emotionally secure functioning adults I would say the following: We were together and I love you. I will always cherish our moment together. I forgive the rest but won’t forget it either.
Regardless of how you experience the intention and impact of infidelity, we all are manipulated by the stories, expectations, promises, ideals, traumas, and fears we bring to the experience. We are the fictional Everyman seeking to protect the imagined safety of the stories, even as the stories eat up our lives.