You are a great guy, but, I totally understand how you are feeling. As many have told me; this is a bump in the road, you can only go up from here. And BTW, it's Ok if we get depressed, I know, been there many times. Just don't stay there!
Writing the letter helps get it all out, but I think it's best to erase it, no matter what happens, C knows what she has done and she has to live with the guilt.
I would also like to say that I think both C and my H are going through the stage of feeling bad about what they have done to us. We NEED to keep DBing even though we don't feel like it, the rewards will be great, because we know we DBed and never gave up!
So Bob, here's another hug {{{{Bob}}}}!
Seems we are going through the same stages; feels like we are backsliding, doesn't it? Well, it's something C and my H have to go through. So drop the rope and give her space. It's hard I KNOW! Because they reconnected with us and know they have backed away.
Don't worry as long as we keep DBing there will be an inswing. Be ready, they will be coming back toward us!