Alain De Botton said this quote

To a shameful extent, the charm of marriage boils down to how unpleasant it is to be alone. This isn’t necessarily our fault as individuals. Society as a whole appears determined to render the single state as nettlesome and depressing as possible: once the freewheeling days of school and university are over, company and warmth become dispiritingly hard to find; social life starts to revolve oppressively around couples; there’s no one left to call or hang out with. It’s hardly surprising, then, if when we find someone halfway decent, we might cling.