Why was my friends with benefits partner unable to recognise my childhood pic?

I am friends with benefits with someone for over 1 year and our interactions have always been online. Recently, i sent him my play school class group photo and he was unable to recognise me. I am very hurt. Even a person with blurry vision would understand its me. He also forgot my birthday this year. But yes, he remembers almost every other important dates or little things. But somehow I can't just not feel very bad about it.
Why was my friends with benefits partner unable to recognise my childhood pic?
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