(idiomatic) to care about something, to pay undue attention to something, to mind something which is a negative nuance, to worry about something

plain negative imperative form of 気にする: never mind!; don't worry about it.

to have an interest in something or somebody, to be inclined towards doing something

(idiomatic) to cause concern, to be worrisome, to be on one's mind / to be interested, to be curious

be careful, watch out / take care

to be careful about ~

everything

(colloquial) current boyfriend

everyone, one and all

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)