I think I might have been closer to my brother when we were younger then now... I used to make him act out my stories with me, but after I learned how to write, I'd just write them down instead... We drifted apart because I was more into TV and he was more into Videogames. So now we barely even talk. And since earlier this year, we live in different houses.
I think it's because he's two years younger then me. If he was several more years younger, I might have felt more like I should take care of him, like Kaiba and Mokuba in Yu-Gi-Oh!, who are five years apart.
When me and my brother would fight, he would pull my hair and stratch me... Still have some scars from that... one on a index finger from when we were fighting over a knive, but it was from his fingernail instead of the blade. I would just fight with my fists, which don't leave any marks... Besides, I don't have finger nails...