There are many shared traits between family and coworkers. Frankly, I'm surprised that you don't understand this, considering that you undoubtedly place a great deal of value on your work. People form bonds with those they surround themselves, whether they are blood related, personal friends, or coworkers who become friends.

It's merely semantics. Family, friends... I find that sometimes, it's best 'choosing' who you call kin.