My Little Brother Ignores Me. What To Do?

My little brother, who is not that much younger than me, only gives me attention when he wants to show me stuff. I pay attention and try to understand his interests, like his deep interest in sports, even when I, myself, am not so fond of it. When it comes to what I like, though, he ignores me. I try to show him videos and talk to him about what I like, and he blocks me out. I don't understand why he does this, and it honestly hurts when he tells me to go away.
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He's in Middle School, and I'm in High School.
My Little Brother Ignores Me. What To Do?
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