For years I felt that I could never get married as I knew I would always emotionally need diapers. When I was in my early 40's, however, I met a lady who seemed to fall in love with me, and I realized that I needed to tell her about myself, so she wouldn't be hurt if I sprung it on her later. It was hard, but I told her that there was something very strange about me that I would have to tell her sometime, something hat would never go away. Then I decided that there was no moment like the present, and told her. She didn't say anything. So I added: "telling you this is almost the same as asking you to marry me." – I thought a bit more and added: "I guess that is what I am doing." – and she said "Yes."
It has been 26 years, three children, and various pets later – and every year our marriage is better. She isn't involved in my diapers, and she doesn't want me to wear in bed with her, but she puts up with it, and even will transfer my diapers to the dryer, fold and put them away. We try to keep my baby gear out of site of the kids, but I think they know about their diaper Dad - though it is never discussed. My 23 yo son walked into my room just after I had gotten out of bed in diapers and plastic pants, but turned around and quickly retreated while he was staying with us this year, but never mentioned it.
Life is full of compromises, I wear in bed when I am away on business trips, and when she has gotten up early I will change into diapers if I am getting up a few hours later than her. Nothing is perfect, but life is good, and I do not have to hide anything from her.