I have a ...weird sort of family. My oldest sister, is 22 years older than I am. We get along wonderfully, we always have. She and our mom were actually pregnant at the same time! :D So her daughter, my niece, and I are the same age, and we grew up together as best friends. Now, that said, it's kind of like having 2 moms, at least during the last 20 years. Our mom passed away 25 yrs. ago, so she & I have become even closer. At her age, and because she has a debilitating disease, it's like having an elderly mom.
I also had a brother who was 20 yrs. older than me. He was my HERO! I loved that man...like a brother! lol He was a military man, gone most of my life, but very good to me as a child. He was a wonderful father too. He died 6 yrs. ago.
Then I have a sister closer to my age, 5 years older. We got along growing up together. But after she left for college & moved away, she changed. She never really kept in touch with any of our family very well after that. Phone calls here & there, but that's it. She chose to move across the country & make a new life for herself & we've not been that close since. I call her every couple of weeks, and I know in a pinch we would be there for each other. But it isn't the same. I miss her.