Hang in there. You're only a couple of months behind me so we're in this together!
Read the books and control your emotions.
Take care of yourself, take care of your kids. She's going to do what she's going to do. All you can do is set the conditions for her to want to stay. That's where I've been screwing up the most...I can't keep my emotions (read...pain, hurt, anger) under control. Why would she want to stay around that?
It's hard work, my friend but it's the work we have got to do!!