FWIW, from my POV that letter was radically honest and I think could go a long way to breaking down his walls, and yours too. I think that was just what he has been waiting to hear from you.
Karen,
Why would you think that was too much? Furthermore, why would Heather have to worry over the weekend? I think she is in a much more secure position regarding her relationship now than she was last weekend, even though there is a lot of work to be done to get there. The uncertainty factor has radically shifted. Now all she needs to do is just do it, IMO.
