Nora Ephron writes about being single versus married in her autobiographical novel Heartburn:

One thing I have never understood is how to work it so that when you’re married, things keep happening to you. Things happen to you when you’re single. You meet new men, you travel alone, you learn new tricks, you read Trollope, you try sushi, you buy nightgowns, you shave your legs. Then you get married, and the hair grows in. I love the everydayness of marriage, I love figuring out what’s for dinner and where to hang the pictures and do we owe the Richardsons, but life does tend to slow to a crawl.

And on loving versus hating someone you marry, Ephron states,

You fall in love with someone, and part of what you love about him are the differences between you; and then you get married and the differences start to drive you crazy.