How to not project an ideal on people you like?

I do it every time when i crush on a girl, i don't put them on pedestals but i exadurate parts of the person i like whail downplaying characteristics i don't like. Just when I've thought I've grown out of it i do it again. What helps to prevent this weird illusion or is it ok to do and the couple just gets over it after?
How to not project an ideal on people you like?
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