Japanese phrase
気にしてないよ。 ki ni shi te na i yo
Meaning
I don't mind.
When to use it
Shows that something does not bother the speaker. It gently reassures someone after a small mistake or inconvenience.
Example dialogue
ごめん、消しゴム使った。 go me n ke shi go mu tsuka tta
Sorry, I used your eraser.
気にしてないよ。 ki ni shi te na i yo
I don't mind.