How does a girl respond to a guy ignoring her if she likes him vs if she doesn't like him?

As the question asks... how would a girl respond to a guy she doesn't like clearly ignoring him vs a guy she does like clearly ignoring him? Would she try to talk to the guy ignoring him or not if she likes him and doesn't?
How does a girl respond to a guy ignoring her if she likes him vs if she doesn't like him?
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