B-V2, you sound like you're doing all the right things. Definitely don't send the letter to her, as it likely won't do any good. Let her initiate contact, and just be friendly and pleasant toward her when she does. Sounds like you're dong well with your GAL activities and adjusting your life to get rid of the habits that weren't contributing to your happiness. You've obviously done your research! The trick now is to stay on course and not deviate from this path. She may or may not come around, but as you noted, you can at least focus on yourself and your own happiness for the future.
M: 43 H: 39 D: 14 Married 15 Together 16 BD: 6/2014 S: 8/2014 OW revealed 10/2014 Instigated dissolution 12/2014, in progress So over it!