Op,
I feel for you. Unfortunately, it's not just women that suffer this.
My XW and I gradually stopped having any sort of intimacy. It wasn't my decision. One night, she told me to stop snogging her, as she felt like I was suffocating her (My kissing technique had not changed in the 15 previous years of our relationship). Then I couldn't masturbate or finger her, then I couldn't touch her breasts. Eventually, we stopped having sex.
I put up with this for some time, but one day I woke up and decided I couldn't be in a sexless relationship any longer. We talked about it, and she blamed the Menopause (which is fair enough , I now know that can have a huge affect on libido, both up and down), and we eventually divorced.
I also now know that she suffers from depression (I didn't know at the time, but, in fairness, neither did she), which was another factor.
Op, you have to decide what you want from the relationship.
I'd say that you have to force him to talk about the issue. Maybe arrange a baby sitter, and book a night in a hotel (so he can't easily escape!
), and sit him down.
However, decide what you want from the talk beforehand.