Being by yourself

I was reading something about how people should appreciate being by themselves, rather than feeling lonely, and that you should do things you enjoy when you're alone. I liked this example: you might think it's not worth the bother to cook a nice meal just for yourself, and instead you eat a peanut butter sandwich and then watch TV while thinking negative thoughts about how you're a loser for being at home alone. But if you were on a date with someone you really liked, would you eat a peanut butter sandwich with them, stare at the TV, and insult each other? You wouldn't treat someone you liked that way, so why treat yourself that way?