I'm so glad I had siblings (and still have them!) growing up - they've impacted my life in ways they probably don't even know!
I have to add in my honorary sister too, because my life is nowhere near complete without her. My best friend, who I've known and been best friends with since kindergarten, is considered an honorary member of my whole family. She calls my mom "mom" and dad "dad" and we are closer than most people ever will be. She is AMAZING and I love her so much. We've been close for the last 20+ years, which is a beautiful and rare thing. Other people have been extremely close to her and I both, but no one holds a candle to our bond. It's just one of those things you can't compare.
And here is a picture of my whole family minus my older brother (Mom, Dad, Sister, Brother-in-law, Brother, Honorary Sister and Husband):