You shouldn't worry about that. Remember, you will not be comparing your life to anyone else's this weekend. The speakers will tell you about their lives. Perhaps you will relate to them, perhaps you won't. You will recognize the pain they feel. That is shared by everyone in the room. I would say that someday you and your H would make great speakers for Retrouvaille, because your story is a little different. There will be people who will be so happy to hear your story and will recognize themselves in it.
You do know that romantic love was invented in the Middle Ages to keep the younger sons who did not stand to inherit land from attacking the landed gentry. They set these men on impossible tasks to win the hearts of married women with great deeds and good manners. It was all a great game, not supposed to land anyone in bed with each other. Just to flirt and keep the young men occupied. It is not the most important thing in life.
