Bill: I've been lurking for some time here. I am married to your "twin". Except my husband and I are about 20 years older than you and your wife. I wish that I had divorced my husband when I was in my thirties, but I did not have the courage. I stayed because I felt it was best for our daughter and son. Maybe I did the right thing, but it doesn't feel that way now. Every morning when the alarm goes off, the first thought I have is "I hate my life." It is an empty and meaningless existence. Yes, I have friends and activities that are worthwhile, but they don't replace the gaping wound in my soul being married to a man with no passion for me, who is so self-absorbed or self-contained that we have not made love in over two years.
When your wife gets back, arrange for your boys to stay with friends or relatives, even for a few hours. Then, don't say anything -- but TAKE your wife. Ravish her. And FEEL it. That would be a real 180 in your situation. Let us know how that goes.