I know it can be difficult, but try, try with all you have to be each other's best friend. Be each other's guardian and protector. Be each other's advocate. Sometimes we don't know what a special bond we have with our siblings until that bond is broken. Sometimes it becomes broken beyond repair, and that is a sad fate for two people who grew up under the same roof, suffered the same punishments, went on the same vacations, and survived childhood together.
I see some siblings who have a friendship, a bond that nothing could ever fracture. That's what it's all about, I think. I envy those relationships.
Please, do yourself and your brothers and sisters a favor, be nice. Just be nice to each other. You don't have to like everything they do, and they don't have to like everything you do. You can disagree without hating. You can even think they are complete idiots. But be nice. Love them for who they are, and they'll love you for who you are, and in the end, you'll each have lifelong friends, confidants. Someone who you can tell anything to, someone who can see through you and knows the real, true you. Someone who remembers that time you got grounded for whatever stupid thing it was that you did that one time, and can remind you of it when you need to be brought back down to earth. And don't we all need that kind of grounding sometimes?