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