Heh. I'm nearing 40, and the thing that's really started to get noticeable is that happiness without one... it's definitely possible, but
easily? As your body slows down and breaks down, if you don't have some kind of pretty damn close relationship with
someone, shit actually starts to get increasingly hard, and especially if you're not pretty fucking wealthy. It's damn rough, tbh, and just kind of compounds whatever other issues may have existed.
It's more about mutual support than anything to do with romantic love or relationships in that general region, but, well... most cultures that's the only way you
find that kind of support, family of some sort. Stuff more distant than lovers or parents/children rarely seems to cut it, not that even those relationships are any sort of guarantee.
It's kinda' the rub, really. If you don't have someone that really cares about you, well. You don't have anyone that really cares about you. Y'know?
And if there's a society that's supportive towards folks like that, I don't know of it