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

to give off the sense that ~ / to feel that ~; to think that ~ / to be in the mood to ~

failed creation; failure

loser, (a social) failure, also-ran

be careful, watch out / take care

to be careful about ~

everything

(colloquial) current boyfriend