I'm 58 years old, and, except for brief periods of dating people years ago and assorted other sexual experiences, have never really been in a relationship. Haven't made any attempts in those directions in nearly two decades, and have adapted well to this reality. I live by myself, am self-supporting, and had the companionship of two adorable dogs for most of that time, which made it easier. I used to feel agonizingly lonely, and burned with envy at the seeming ease with which other people I knew met lovers and mates. Luckily, I've had enough friendship, stability, good meds, amusements and mental health resources within reach to have made much of my despair about being a "Forever Alone" fade away.
Interestingly enough, I feel far more capable of having a relationship with someone currently than I ever did. I've worked my balls off over the years to acquire better "executive functioning" habits and develop social skills that I was deficient in when I was younger, as well as persisting in looking for and finding skilled help for my personal collection of comorbidities (otherwise known as my "family curse"), mild Asperger's being the latest trophy on that shelf.
_________________
"I could have been wild and I could have been free
But nature played this trick on me..."
? the Smiths