Do you really want to save your marriage? Any answer is perfectly fine at this point. Really ask yourself that question. If a magic fairy appeared and said that they could save or end your marriage today, what would your wish be?
If your true answer would be to save your marriage, then you need to make some major 180's at this point. Try something different. It seems as though everything that you have done has not worked. It is time to flip the script.
Here is an idea that you could at least try and see what the reaction is:
Pick a night this week or over the weekend. When your WH is out, get dressed to the 9's. Hair, makeup, clothes...all of it. As soon as WH comes home, tell him that you are going out. Tell him that the kids have had dinner and that you will be home later. If he asked where you are going or who you are going with, tell him you are going "out" with "friends". THAT'S IT. If he asks when you will be home, say "later". If he continues to press you on it, tell him nothing, just leave. You can go wherever you want. Go to a bar. Meet up with an actual friend. Go to Target. Drive around and listen to music. WHATEVER. Just go out. Don't stay out too late, but make sure it is about 3 hours.
Just try this once and see what happens. Change things. Do something different and see how he reacts. I would normally not recommend this to some LBS, but it seems that you have nothing to lose at this point.
His reaction will tell you a lot about where you really stand and you can plan your next course of action based on it.
M-42 W-40 S-12 D-10 Together-13 years Married-10 years Separated-6/2016 ILYBINILWY-7/2016 EA-4/2016 (best guess) PA-7/2016 (best guess)