There isn't someone out there for everyone
There always seems to be this deep societal belief that love is ultimately something everyone will eventually find. Which is strange to me, because in a world where wars are tearing apart countries, children are being abused and afflicted with terminal illnesses, and the worst kind of criminals get away with crimes all the time, the one place society seems to be believe that fairness exclusively exists is in love and romance. That, even if it takes a while, eventually everyone will find love.
Some people never will. Love is like money. Some people are born into it in abundance. Some people find it along the way. Some people a few times, some once. But some people never find love. They go their entire lives without ever finding anyone.
Jane Austen (the writer of probably some of the best known love stories/satires) died at the age of 39, fully believing she would one day find her true love, and she never did.
Not everyone finds love. And that's a simple but very unpleasant truth that many can not accept.