I've got not much to add to 25's excellent advice. You do need to get your attitude adjusted to being a happy go lucky guy regardless to what your W is doing now or in the future. That is the thing that will make you attractive to your W or any future ladies should your marriage end in a divorce.
25 is coming at this as someone who had their marriage saved. But her perspective is not much different than myself and others like Mike from Tennessee in the "Surviving the Big D" section who thought you were batchit crazy. Just get yourself in a mode for a life without your spouse and you will have a better chance at having the life with her.
I wanted my marriage and floundered at first, but I discovered fairly quickly that I refused to be a doormat waiting around indefinitely on a wife with low morals. I grew a spine and enforced some boundaries with her - the most serious being my filing because of terrible behavior on her part of exposing an affair in front of the children. In the end, she saw that I had changed and gained emotional strength and she wanted back. I could have stopped the divorce, but I learned to enjoy life much more without her in mine and I dont regret the path I have taken.
So you have a choice of wallowing in self pity and praying to god, which will not appear attractive to your wife. Or taking your life into your own hands and making yourself happy, in which case you run the risk of realizing your wife is not worth the gum on the bottom of your shoe. But at least with the second option, you can move onward in your life with dignity and honor.
