The notion that every person has a soulmate is largely a product of wishful thinking. This idea is refuted by millennia of human history, wherein sexual selection has favored female reproductive success over male reproductive success. More specifically, around 80-90% of females have reproduced compared to only 40% of males.²
Today, a growing number of young men remain single, with more than 60% currently unattached. A significant minority may never experience a romantic relationship over their lifetime.¹
It’s a fact of life that, historically, more men than women have lived and died alone. Today, an ever-increasing cohort of men willingly accepts that fate.
For those who decide it's better never to love at all than to love and lose, others should respect that choice—or recognize that some people may never have that choice in the first place.
¹ https://thehill.com/blogs/blog-briefing-room/3868557-most-young-men-are-single-most-young-women-are-not/?utm_source=perplexity
² 
TierneyLab
Is There Anything Good About Men? And Other Tricky Questions