I met my wife at 18 and we were married by 20, but we never had children. Before her I was with a number of men and girls, and I am not proud to say, I was also with a number of men during our marriage. We stopped sleeping in the same room when we turned 22, and we stopped having sex at about the same time. We're 33 now. We've always been emotionally close though, regardless of the physical aspect.
I recently moved out after 15 years together. It's hard, but she made it clear that if I continue with my transition she can no longer be with me. Combined with the fact that I much prefer men, well, I think it was inevitable that the marriage would end. I don't at all regret our time together - all things come to an end.