The part of your story which makes me think of your marriage is a sham is that you've stated there's no emotional intimacy. For myself (and, I think, most women) a marriage without emotional intimacy sounds ... pointless, empty, unendurable.
Besides, since your unvarying sex drive from teenage years to the present seems to be an identifying factor for you, which you return to over and over in your postings, it seems that the part of your life which you cannot share with your wife is more important to you than the (unstated) things which you do share.
