What does it mean when a guy said that he care? How is it if it's Refer to a language comprehension?

in my language caring for someone is universal, like care between men n women or friends or family, whether it is in close relationship or not, i wonder is it the same in American culture or European? Or does it have different meaning or implicitly especially if it's said between "close" friends?
What does it mean when a guy said that he care? How is it if it's Refer to a language comprehension?
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