YOU SAID:

Can't help but notice you're not coming back. Which is disappointing.

INTO JAPANESE

あなたが戻ってこないことに気づかずにはいられません。それは残念です。

BACK INTO ENGLISH

I can't help but notice you won't be back. It is a pity.

INTO JAPANESE

あなたが戻ってこないことに気づかずにはいられません。それは残念だ。

BACK INTO ENGLISH

I can't help but notice you won't be back. That's too bad.

INTO JAPANESE

あなたが戻ってこないことに気づかずにはいられません。それは残念です。

BACK INTO ENGLISH

I can't help but notice you won't be back. It is a pity.

INTO JAPANESE

あなたが戻ってこないことに気づかずにはいられません。それは残念だ。

BACK INTO ENGLISH

I can't help but notice you won't be back. That's too bad.