Being single's okay. It allows you to truly discover who you are. That sounds cliche, but it's true. Besides, I CANNOT STAND those people who can't be without a partner for mais than a day.
I want to make sure I understand what your asking. If your asking about not having a boyfriend, girlfriend, husband or wife, it's ok. If you are happy single, you can be happy as a couple. If you are not happy as a single, you mais than likely not find true happiness as a couple. Make sense? :)