YOU SAID:

I need to not be depressed anymore

INTO JAPANESE

私はもう落ち込まない必要がある

BACK INTO ENGLISH

I need not get depressed anymore.

INTO JAPANESE

私はもう落ち込む必要はありません。

BACK INTO ENGLISH

I don't have to be depressed anymore.

INTO JAPANESE

私はもう落ち込む必要はありません。

BACK INTO ENGLISH

I don't have to be depressed anymore.