Draft your letter. Then wait X number of months. Then give it to her.
Responding now is similar to a form of pursuit. Draft something you firmly believe in and then when the smoke clears give it to her.
For an example of the power a letter can have, check out Crimson's threads. It was the ice breaker required to start "courting" again. However, I think you should be mostly detached at the point of sending, and fully understand that there is no guarantees.
Me: 32 W: 29 T:8 M: 6 D4 S2 M - 8/2008 W is not happy - 1/2014 W wants D - 9/2014 W moved out - 11/2014 D filed - 1/23/2015 D'ed - 2/25/2015 Gave X the Letter - 11/10/2015