Yah, It's true that not many would surely want to be alone if there was an insurance of happiness in any relationship they are deeply willing to engage in, but many have run away from any commitments in terms of relationships due to fears, sometimes out of experience and sometimes due to the testimonies other people give about relationships.
I know if you've really lived in an area where people live a "real life", I mean in a "normal society", a society with both good and evil, then you automatically know that things about relationships have not similarity with gravity on earth. While the gravity rate on earth is constant, relationships paces change day after day... I mean, today you're happy and tomorrow you're swearing to kill each other...
This is the way we live today...
But it's not a life style we are proud of, and we know it... because what we desire has a lot to do with happiness, peace and success, not this stress and depression we feel day after day...