I went through 3 with my mom. And she liked to use us kids as pawns. So now i don't like either or all of my parents. My mom is very immature. It sounds lke you are doing rigt by sticking by your kids. Just be careful you don't loose yourself in all this. And I am sorry if he is dating and wants to get back together? that makes no sence to me. My mom and 2nd dad used to cheat on eachother and tell me about so I would tell the other they were doing it. How twisted is that!
I do not tink marriage counciling helps in all relationships. And there are just some people with no matter how open you are they won't be back. Go with your gut feelings on this no matter what. And just love and be honest with your kids. And please don't put down the other parent in front of your kids if you can. I don't know could be why I don't like any of them.Good luck! and if you need apick me up we are always here. Or at least someone will be.