Do we guys fail to recognize when a non attractive girl is interested in us?

An old female friend of mine told me that years ago she was interested in me, but I was not interested in her because I fancied a hot girl. I frankly don't recall of her interest for me. Is it normal? Is it because we don't consider the ugly girls or is it because we pursue the love of the hot ones?
Do we guys fail to recognize when a non attractive girl is interested in us?
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