I have to agree with Frey. It depends on the type of person you are.
Living alone can be great because you can do anything you want and live the way you want, but there are times when it gets rather lonely.
Being alone or single for the rest of your life also depends on the type of person you are. I know people who have lived and died being single, and they seemed to live very happy and fulfilling lives. Personally, I wouldn't want to live and die alone, but that's just me. Everyone's different.