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