Nowadays everything has changed greatly. People have other idea of love, family life and relations than before. Earlier it was a matter of great importance to marry a person and it was forbidden just to live without marriage. At present it is considered to be a usual thing. Peole are used to living before official marriage. They want to check their partners and relations. But is it good to live without being a complete family?
Opinions are different. I think that it's normal. The main thing is to consider you to be a family. You can plan your future life and that's enough for you to feel that you are a whole.
It depends on your values, ideas, principles and upbringing and it is up to you to choose the way of life.