B4, As I read through your last summary post, I am reminded again of just how our lives (yours and mine) have run a parallel course. I could have written every word. While my fight goes on, I understand exactly where you are today and you have my best wishes for your tasks today and in the near future. I have, as I'm sure you have realized that no matter how badly we have wanted it, even a reconciliation would not be possible without significant changes in our spouses, and that is simply something we do not have the power to do ourselves.
Today, even through the frustration and pain, I would tell you not to regret your choices because they have led you to three terrific children and they will always be the major part of your life. I know for me, the one true sadness of the sitch is that my children will never truly have the loving relationship they might want with their mother unless she works on her own issues.
When this is all said and done, take some time for yourself and then look around. There actually are some good people available out there and your children will want you to be happy and not alone. They will see the truth of your efforts eventually and your relationship with them will be stronger for it.
Be well my friend.
Stand up for what is right, even if you are standing alone.