If a guy rejects and friendzones a girl that’s interested what is usually the biggest reason. Is it to do with lack of attraction?

he did it after the first date. I can’t help but wonder what it was it was I just not good enough it suck’s but I guess I will never know.
If a guy rejects and friendzones a girl that’s interested what is usually the biggest reason. Is it to do with lack of attraction?
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