The point of life is not to be married or single - it is to be. We are human beings, or humans being. It does not matter so much what lifestyle we choose - it's what we make of the opportunities to grow, that counts.
I've come to embrace the notion that I haven't done enough in my life. I've come to confirm that one's title, even a title like president of the United States, says very little about how well one's life has been led. No matter how much you've done or how successful you've been, there's always more to do, always more to learn, and always more to achieve.