You married a woman you had no passion for and now she’s leaving you because of it. Sex and passion are important in relationships, and if you’re not compatible sexually, it’s very difficult to make a marriage work over the long run. After eight years of no passion and bad sex, it makes a lot of sense that she would leave. It’s kind of late in the game to try and get the spark going. If you had written me in year one or two — or even three or four — I would have suggested focusing on sex and making sure she was sexually satisfied and that you had romantic dates, and made your sex life a priority. It sounds like you kind of hoped it wouldn’t an impediment and didn’t work on it and now that’s played out and the marriage is ending as a result.
For future, make sex a priority. It’s important in relationships, and while passion ebbs and flows over the years, if you never have it, it’s way more of a problem than if you had it, lost it and want to get it back.
I’m sorry for your marriage ending. It sounds like it’s going to be amicable and I hope that you’ll go on to find love with someone with whom you’re not just intellectually and socially compatible, but physically and sexually compatible as well. 😉