As it is often the case, it boils down to personality, character traits, and culture; if you are someone who is intrinsically and culturally driven to long-term, if not forever, relationships, fine. But if you are not, live your life and respectfully forget about what novelist and imaginative people have written about. I traveled the world on my own, dated everywhere, and fulfilled my childhood dreams of desire and be desired. I had a few multi-year relationships, but don't make me think about them or you'd ruin my day.
Had I listened to the spirit of the times or of the place, I would have ended up miserable, sad, and probably out of shape. Instead, when I am in bed and close to fall asleep, I often think about the exciting life I had, the amazing people I intimately knew, and the dreams I have for tomorrow. To each their own, always. And life has different phases and new desires will knock on my door, maybe a kid, maybe a long-term relationship, but always (I hope...) my choice.