Family in the important sense of the word.
I have a very good friend whose family basically adopted me, but the thing is that even if I were never to have met them, they would be my family anyway.
My friend has always been my sister, and her brothers and sisters my brothers and sisters, but even though we did not meet until about a year and a half ago, people like them have been the world for decades.
I think that is the beautiful thing about family. They have been family all along.