I was married to my best friend for 42 years until she died at an entirely too young age. We had three children and I now have five grand children and two great-grandchildren.
I have been alone for 22 years, but I would not say I am lonely. It was difficult to begin with - it was very quiet.😥 I had to learn how to do ordinary everyday things, because I was a cosseted husband (I prefer that to "spoiled" 😄). But I did learn and also that I didn't have to do them as she had, but in my own way. Now, however, I would find it very difficult, if not impossible, to live with someone. I like doing things when and how I wish to, or not doing things, as I wish to. To adapt to the ways of another person does not appeal.
