Hey Brian
If you stay together for the kids, they will know. They feel the tension, they are much smarter than you think. If you stay together the way you are living now, how will it affect your children when they are adults? I can sympathize with why you want to stay, but if you both want out, trust me, it is for the best.Sometimes you cannot fix what is broke. I hate to say that with small childrren, but sometimes people have to do, what they have to do. It will be hard, very hard, but everyone will adjust. However, if mommy and daddy are happy, the kids are happy, once again, trust me, I know from my own personal experience.
I really wish you the best of luck, take care of yourself