I feel my brother is treating me like a clone of his girlfriend?

My brother is with his girlfriend a lot and when he is at home i feel he is treating me like a clone of his girlfriend. He bought me for my birthday before a perfume that she wears. He also treats me like her when i cook dinner when he works from home.

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My qustion is what do i do about this? I don't feel comfortable with this
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I have said about this to him and he just says that i am jealous of his girlfriend
I feel my brother is treating me like a clone of his girlfriend?
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