Does he think of me as a little sister?

Ok so I’m in HS an and I met a guy who’s some grades ahead and I look up to him as a brother, I’m the oldest so yea. But we’re not the close, but we call each other twin and friend, he kinda treats me how I would say he treats me as a sibling but I don't know bc I am the oldest so I don't know what it feels like to have an older brother. Other stuff he dose is like bangs on my window when I’m in his car or opens the car door for me. But yea am I just overthinking it or y’all see it too?

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3 mo
Sorry chat it’s confusing to read
Does he think of me as a little sister?
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