DC - Sorry Bud. I know how you feel. Weve all been there, but someday you will look back and REGRET how you let her treat you. Mark my words!! Once the smoke has cleared you will resent her even more if you dont start standing up for yourself.
Right now you are ENABLING her behavior. Until you stand up for yourself and follow thru with your BOUNDARIES nothing will change. She doesnt RESPECT you. In fact she most likely hates YOU right now. The least you can do is VALIDATE those feelings of hate by ACCEPTING the situation as it REALLY is. ACCEPT her feelings and LET HER GO. This does not mean that someday if YOU feel like it you will DECIDE to take her back. For now the best thing you can do is ACCEPT that your OLD MARRIAGE is OVER and more importantly you WANT somebody that doesnt WANT YOU. Until you realize how devasting this is to your self-esteem you will continue this downward spiral. Until you realize that YOU are more IMPORTANT then HER right now and for your children you will be STUCK.
Today is a new day. Seize the moment to gain back CONTROL of your LIFE. Let her go find what she is looking for or you will never have a shot at any kind of R with her. Most likely once you DETACH and let her go you will get to the point that most of us LBS do and wonder why you even tried fighting for somebody like that in the first place. Then YOU become the WAS and can decide if YOU want somebody like that.