I'm with you man. Its a fine line that we must weave. My XW is much like yours, always seems so happy. It drives me nuts.
I would suggest keeping your response short and to the point. That is what I try to do now. As a matter of fact, I try to let her initiate all contact.
If I were you, I would do the same. The thing you have to do is try to give your w the same impression that she is giving you.
As I stated above my XW always seems so happy, but I have heard from a few of her close friends that she misses me as much as I miss her. My xw wife is a very proud and independent women, she made her decision and I will be the last person at this point that she show she maybe be second guessing. I am prepared for the long run.
Get the book "hold on to your nuts" and read it. I just got it, and I wish I would have had it much earlier in my process. The thing we have to show our wives is that we are pround, strong, good men. Not needy, wuss, begging and pleading. I have made it clear to my XW that I was willing to do anything to save our M. Now I will show her that I can svurvive and even thrive with or without her!
Good luck my friend!!!!
Keep the faith!! One Goal! Thanks CZ me: 34 XW: 29 D: 5 T: 13 M:9 Dday: Sep 18, 08 joint legal and physical custody of child XW recently told me, she d me, cause she tought I would abandoned her!