Marriage: Here's a weird one for ya!
Sounds like a situation I have been in. However, me being me, I can only say I've been there, done that.
Edit: Sorry, never been married, but same situation with girlfriends.Being "good together" is one thing. Being "right together" and being "perfect for each other" are completely other things. When people are "right together" or "perfect for each other" they don't split up in the first place. Sometimes people who are "good together" make better friends than spouses.
Apparently, your ex-wife was "good together" with her present husband for awhile too. It seems like she's someone who marries people because she thinks "good together" is grounds for getting married.
One thought is this: Why did she even allow you to be "back in the picture" in the first place, and why did you even get back in that picture when you know she's married? ("Back in the picture" usually means that people have gone beyond just sending one another a Christmas card and being cordial when they run into one another a the mall.)
Your ex-wife either made a mistake marrying you or made a mistake divorcing you. So, she either made the mistake of twice marrying someone who isn't right, or else she made the mistake of divorcing someone who was right for her and, on top of that, marrying someone else. She seems to have a mistake pattern going there, one way or another. Again, though, maybe it's just my thinking.
Maybe I'm just to quick to call more than one giant mistake "a pattern". 
I'm not looking for any answers to the questions here. I just think they're questions you ought to be asking yourself. What I've noticed (after being married and divorced and knowing other people who have, as well) is that when a relationship seems like the foundation of it is 75% good and 25% percent bad, that doesn't mean it's "mostly good and only a little wrong". It means it's 100% wrong, and it's only a matter of time before those cracks in the foundation lead to major crumbling. You didn't fix those cracks in the foundation before, and it's unlikely (I'm guessing) time did anything but let them be covered up or forgotten. Maybe that's just my thinking. I just know that my ex-husband and I make amazing friends and not-so-amazing spouses for one another.WEEELLLLL....I'm coming from the "second spouse" standpoint. I married someone who told me during our marriage that while he was married to her, he'd look at her and think "I don't even like you, let alone love you." LOW AND BEHOLD......their new found "LOVE" was the demise of our marriage. Can you really put sour milk back in the frig for 10 years and suddenly it's fresh? I doubt it. Sorry, to be so negative but I sincerely doubt they are any happier than previously.....but whatever. I found it to be a huge waste of 7 years of my life with this man AND that is what hurt. Keep in mind that there are others involved and alot of hurt to be had by others. She and he are now remarried. Good for them.
She wore WHITE during their wedding....she broke up her marriage and he broke up ours for one another.
But I'm not bitter....so that's the important thing
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