Time to get back to earth. As for confidant working to get them together, what does that matter. If that were the case, it would have happened already, IMO. Obviously, H may still have feeling for FC, but then there is nothing you can do about it. And in all honesty (and again IMO), FC has zero interest in him.
In regards to me's idea it is good and well intentioned, but watch it. It seems like more of the same. You have been quite passive throughout all of this. My W wrote me a few notes notes. I read them. She never followed them up. What is your strategy after that? What do you do when your H ignores them? Only once in my marriage can I think of a time when the W said, ok pal, enough of that shit. It was the only time I listened. Well, I did listen one other time. Of course, this was after she left me.
It is obvious that you are unhappy with the way things are going. But your H is also unhappy. Why is he so unhappy? He has an excellent wife and great kids. It goes beyond you. The real problem is himself. This is something that I have an idea from my life. I was with a woman that was my dream. Why couldn't I be happy with her? It is simple. I wasn't happy with myself.