Thanks for calling me an angel - I appreciate that.
HERE ARE THE REASONS WHY I THINK YOUR W STILL LOVES YOU:
1. People who are truly resolute about having a D, will not go to counselling even once for 'one last time'.
'One last time' shows that she is sentimental about your M, it also suggests she is not letting go 100%. I have heard from people involved in extramarital affairs and often the spouse who is doing the cheating will say that before they reconcile with H/W they have to go visit OM/OW 'one last time' before they get closure. This has nothing to do with closure and everything to do with not being able to detach from OM/OW.
If she just wanted to say thank you for the letter, she could have done just that, say thank you, or maybe write you a thank you letter or even just say what she had to, to your face. She didn't need MC for that.
2. She kept the letter. Hell, even I destroyed all the letters H wrote me (something I regret now) and I admit to being in love with him, so she must have some pretty strong feelings.
3. She has offered to call you (she isn't letting go).
4. She has said she misses your friendship etc (my H said the same thing and then it gradually progressed to I miss your sex, I miss being with you, let's have a hand-fasting ceremony!).
5. She probably isn't 'in love' but I think it's obvious she loves you. Being 'in love' is a state of contentment/happiness that can be attained again if your friendship with her develops - after all, that's how you fell in love in the first place. You became friends, liked each other, got attracted and fell in love. There's a film called 'Captain Corelli's Mandolin' set in Greece, and the character in that film, says that being in love is a temporary madness and that true love is what is left behind when being in love burns away. I think that is so true.
I would carry on being friendly towards your W, and interested in what she says, but no R talk and no begging/crying etc. She seems to respond well to your 'friendship' - carry on cultivating that and I am sure it will develop romantically. Be prepared for it to take a while, you are starting from the beginning there, but I think you have a good chance providing you don't get emotional and let her make the first moves.