How does it feel to have a sibling?

I am a single child and have always wondered how would it be to be with a sibling. Yes I was always alone and there is this pressure to excel cause you just have this undivided attention. But on the positive note you also feel more loved and pampered because of the same. I recently got to know from my parents that i did have a younger brother who sadly passed away during birth. Since hearing this, I’ve found myself reflecting on how different life might have been if he were here with me today. To those of you who have siblings, how does it feel to share your life with them? Do you find yourself grateful for the bond you share? I’d love to hear what makes having a sibling special for you!