There are people who remain unattached through life because they have never found the right person for them. This is a sad occurrence for many people to see, but they must understand no match is better than a bad one. The person who is not willing to settle for just anyone knows who they want, and they are willing to wait as long as it takes to find them. They are willing to do this even if they know the search might last a lifetime.
The events of life often separate people, and this can interfere with forming a good long term relationship. People begin dating when they are young, but life may take away the person they planned to be with forever. War might have caused the death of their loved one, or an accident might have stranded them far away from each other. Some people will move on and find someone else, but others will wait a lifetime to be with the one they truly love.