Reality is not the same for all people. We are all individuals, we all have different circumstances, our lives unfold in different ways.
This is the potted version of my life:
went on holiday abroad as teenager, feel in love with slightly older man, maintained 10 years long distance relationship writing letters and meeting up every 6 months until we had finally saved enough money to marry, now close to silver wedding, never been interested in another man, can't imagine ever wanting to be
In somebody else's reality, he might well have turned out to be an axe murderer- or just a really, really boring man.
My reality is that I have had and still have a very happy life, that we work well together, that we have fun and look out for each other and function as a team. Naturally, we have both changed a lot over the last 35 years- but I like the man he has grown into. And I consider myself as somebody with high standards in men. Sheer fluke that the first one I found one actually happened to meet them. I still don't understand it, but I think that is kind of the point: life is unpredictable. And I do like to think that I would have walked if he had not turned out to be what I thought him. As it is, I can see how the older him has been shaped by the life and the difficulties we have shared together, and that makes it even more meaningful.
Don't know what I would do if he died. I have a very absorbing job so I don't think I would need to rush into a relationship just for the sake of it. To me it has always been about having this man, rather than about having a man.