The divorce route may seems to be an tough path to take but it is not necessary the case all the time(Not that I am advocating divorce here) but if you are suffering and unhappiness builds up in the marriage, it is time to let go. Follow yr heart. Do you want to stay on the marriage because of the kids and close one eye ? If yr hubby ask for forgiveness, prob. u can give it a final try. If he is still not rependent (like my case), you should know what is better for you.
For me, life is happier after the D, because I am finally "freed" from agony and emotional sufferings. My kids are coping well cos they are never close to him (he visit them once every 2-3 months). Every case is different. If yr hubby is a good and responsible father, at least u know that it is still worth mending the marriage. If my ex is not abusive to me and I have to file so many police reports against him, I would definately gave him a chance to be together with him. Anyway, everything is already over, though it took me nearly one year to build up my confidence better again.
Tired mom, be strong.