As hard as it is, Lost, I wouldn't mention anything else about the relationship, including divorce. I think that the MLC often uses that as a taunt, because more than anything they want someone to make the decision for them. If you go ahead and file, then for him it will be "she left me no choice, I had to leave the marriage...." If he really wants the divorce, he will file. My husband at first also seemed to bring up divorce several times a week (back before I found DB website and was doing the wrong things like begging). Now its a year later and he's still here - obviously not so sure that that is what he wants. You have to trust that things will get better. Staying dark gives him some breathing room to think about what he really wants.
No, it isn't fair, nothing about the MLC is. We didn't ask to get taken on this ride, but because we love our husbands and our marriages it is something that has to be dealt with. If you can focus on your children it will give you much less space in your mind to worry about what he is doing.
Me - 38 Husband - 40 MLC! Together 12 years Married 11 years Still the love of my life Forever only lasted 10 years before his MLC and affair