Steviej: we have discussed an amicable split. The problem is apart from the lack of intimacy we are still good friends. There's no hate or dislike. So we have decided on counseling, I think after 14 years we owe it to each other to try. In some ways she's been remarkably tolerant of my clumsy attempts to find a solution.
Loverboy: I think the depression factors in more in the sense that the depression has been exacerbated my the lack of intimacy. I certainly didn't deliberately set out to improve my mood by finding another person.
Thanks to both of you for your constructive replies.