Dying alone is how we all go. Death gets us all in the end, marriage is not some magic cure to that.
With regards to being "remembered". I have a child, I hope my child has children and that I do a good job laying the foundation for all of them to have happy lives, insofar as I can. I hope I am remembered well by them, but that's not the sole purpose of my life. Needless to say I am not in a relationship with my child's mother and I wouldn't want to be. I'm not going to have more kids so a relationship with a woman offers nothing to me.
As for people generally, I couldn't give a toss if they remember me.
To give my own spin on a point a couple of men here have raised, I too would rather go out quickly and on my terms than waste away slowly in a hospital or a nursing home, each day able to do less.
As long as there's hope of good times still I'll cling on. If I get a disease that will kill me mentally before physically, I'll go out on my own terms. Probably jump off a high cliff onto a solid surface to make sure the job gets done.