Why do girls hide there true feelings?

Girls say they don’t like you when it’s obvious that they do. Even if you tell them you like them first they still won’t admit it. It’s frustrating because I know they do but won’t say those words for some reason. Even if nothing happened between us two but later admitted that I liked them back then, they still won’t say they did they just hold it close to there chest and never let it out. Even when there girlfriends tell you that she likes you, they won’t admit it. And I know the difference when a girl doesn’t like you so no comments saying ‘because they don’t like you’
Why do girls hide there true feelings?
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