I'm rather a newbie myself, but I think many would advise that you do nothing, other than look after yourself and your children, find things to do that you enjoy, be happy when your H is around, don't ask him any questions, etc.
I read Divorce Remedy, which is an update to Divorce Busting - you may want to check that out too.
Sorry that you're here, but glad you found this place. It makes an enormous difference.
