Why does a guy follow girls who dont look like me?

I have a crush on a guy who also have crush on me, but I’ve noticed he mostly follows girls who dont look like me. I am skinny girl with Brown eyes black hair and he follows girls with blond hair blue eyes and big butts/breasts. I dont understand it but I am 1000% sure he has crush on me

Why does a guy follow girls who dont look like me?
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