I've had some really shitty family and the way I see it now, your family is the people who are there for you, and not only do you care about, but they care about you back. If I had a friend I knew for years who had my back always, I would consider him family. My brother (who's a planet but that's one of his lesser sins as if you could believe it) is not family to me at all and despite doing many things together I'd happily call him a stranger now. Family isn't blood, it's respect and love.