Under normal circumstances woman want a relationship with someone of similar age, they are as fussy as men, look at internet dating and the age ranges they specify
Depends what's wrong with you, my Dad had Parkinson's needing hoisting about, no quality of life, my mum has dementia, currently in the time shifting stage, sadly you don't just get old and die
It's certainly great being single but when you get to the vulnerable stage you really need a live in "girlfriend" or carer.
Some guys have a wife/girlfriend and carer, not sure what happens when you are at the nursing home stage