maggiesensei.com/2011/10/20/request-%e6%b0%97%e3%81%ab%e3%81%99%e3%82%8b-vs-%e6%b0%97%e3%81%ab%e3%81%aa%e3%82%8b-kinisuru-vs-kininaru/
Detailed explanation of the difference between 気にする and 気になる, two commonly confused Japanese expressions.
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