What would you do if this happened to you?

So today was my birthday and my younger brother basically ignored me for the whole day. Never say good morning or even hi this morning. Not even a happy birthday. He did this last year too. He remembers everybody else birthday but when It comes to mine he so calls forgot. Even my 9-year-old niece reminder so that's no excuse. At this point, I believe he is using me for what I have. He never shows me that he cares unless he wants something. He shows his other sister more affection than me. He normally just takes whatever he can get from me. At this point, I'm so done with him. He normally makes fun of me or calls me ugly and sometimes looks at me funny when I say something. His other sister says some crazy things at times but he never makes fun of her because she buys him stuff. I'm the one that showed him the most affection since he was a baby and I get treated this way. Does anyone have a sibling like this?
He's 10 years younger than me by the way.
What would you do if this happened to you?
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