Mom, Like your H mine is 'shacked' up with a much younger woman. He is 42 next week and she was 26 in Feb. She is also a foreign national, doesn't work etc etc. They have been together about 15 months and have been engaged nearly a year! We have not even started D proceedings as I type! So I know totally where you are coming from.
My kids are all teenagers (or nearly)and it has been very hard on them b/c they know all the implications of this. If your's are still little at least you can spare them the 'gory' details. Mine asked the questions for themselves.
As I said yesterday, stop checking his account it only causes you more distress. Follow to the letter the advise RCR has given you she is very good at it!
I also know what you mean about seeing other 'couples' together. There have been several times in public when I have broken down in tears due to just this scenario. It does get better I promise.
I am unable to give you any advice about D b/c as I said my H and I are not there yet. My H does keep threatening it though and I found fairly quickly that the way to perpetuate these threats was to beg, plead be bitchy etc. Now I just tell him that he has to do whatever his conscience will him to do. I'm pretty sure he will file eventually (probably when we have been separated 2 years)but I will definately be contesting it and with any luck the court will make him wait until we have been separated 5 years. After that he can D me without my consent. Originally he wanted me to D him for adultery but I refused even though I was well within my rights. This made him extremely angry but I was determined not to give in to his demands. I have my pride and principles and 'til death do us part is a very strong one for me.
(((((((((Hugs))))))))))
Me 43 XH 45 M 2.7.88 Divorce 7.10.09 Kids D20,S17 & D15