I was similar in that my wife and I dated for 10 years and the question was always “when are you getting married?” This came from a lot of directions but mainly my mother. I finally asked her why she cared so much? She stumbled around a bit and then I asked “what is it we can do married that we can’t do now?” This really threw her for a loop and the only thing she could say was she wanted grand kids, all of her friends had grand kids. I answered that “I am not ready to be responsible for another life but when I am we will get married.” This shut her up until about a month after the wedding.