Your single greatest fear
I would forward this to my mother, but she can't work the computer. Marriage didn't save her from that!
As Kay Trimberger has noted, marital status may not be as powerful a predictor of whether you will die alone as whether you have maintained a circle of friends. In fact, the intensive coupling that some married partners practice (whereby all of the once-important people in their lives are moved to the back burner as the marital relationship becomes all-consuming) may be what leaves people particularly vulnerable to loneliness and dying alone when the marriage ends.
I have another challenge to the "Horrors: You'll Die Alone!" threat: Some people actually prefer to be alone, even in death. For a beautifully written example, read the afterword in the book Party of One, by fellow Psych Today blogger Anneli Rufus.Suppose, though, that you are not one of those people. Suppose you really do want people around you when you die. I'll even up the ante: Suppose you want a spouse there with you when you die. Still, I have to wonder: Should you let that wish for your final hours determine the fate of the rest of your life? Should you find someone to marry, even if you are not sure you really want to marry? Even if you do want to marry but have never found a person you truly want to spend your life with, should you marry someone who is a "good enough" partner just to have a spouse there with you at the end?