Being single isn't bad

Being single has its pros and cons, but one thing's for sure: it's not the end of the world. If one of the reasons you haven't ended a relationship is because you're afraid to be alone, that's normal. A lot of people feel that way, but it shouldn't be the only reason you stay with someone. The thought of  being on your own can be scary, especially if you haven't been a single for a while, but people do it every day, in fact, there are hundreds of thousands of people doing it right now, and they're just fine. Happy even. A lot of things in life are scary at first, but you do them anyway. You figured it out, and you adjust. Because that's what life is about.
Just because you're single doesn't mean no one wants you. People aren't looking at you and going "yuck, what's wrong with her?" Being single by choice is perfectly legitimate, and it means you're comfortable with who you are, and don't need anyone else to define you.
You'll have way more time for yourself. What's scary about being able to watch all the reality TV you want, getting a great night's sleep every time, and never being obligated to go to family events you don't want to go to? Sounds pretty great to me.
No one is in a relationship their entire lives. But still, we spend so much time pining after what we don't have that we forget to appreciate the great things about being single. You won't be alone forever, so stop obsessing and just live.