Why can't I get over a girl im in love with but never dated?

known this girl about 4 to 5 months and she has her best freind tell me she dont wanna talk in any way thats fine but i can't get over her and its really annoying even if im eating dinner i wonder what food she likes and i just wanna move on but its almost like my brain says move on and my heart says no

Why can't I get over a girl im in love with but never dated?
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