YOU SAID:

I'm just wondering what my boyfriend's doing for the rest of his day

INTO JAPANESE

私彼氏の彼の日の残りの部分で何をしているか疑問に思って

BACK INTO ENGLISH

I wondered, do what you are doing with the rest of his boyfriend's day

INTO JAPANESE

彼の恋人の日の残りの部分で何をやっているかと思った、

BACK INTO ENGLISH

Or doing what the rest of the day with his girlfriend and I thought,

INTO JAPANESE

彼のガール フレンドと私の日の残りと思ったのか

BACK INTO ENGLISH

And the rest of the day with his girlfriend and I thought?

INTO JAPANESE

思った彼のガール フレンドと私の日の残りの部分?

BACK INTO ENGLISH

Part of the rest of the day was his girlfriend and I?

INTO JAPANESE

その日の残りの部分は、彼のガール フレンドと私でしたか。

BACK INTO ENGLISH

The rest of the day was his girlfriend and me?

INTO JAPANESE

日の残りは、彼のガール フレンドと私でしたか。

BACK INTO ENGLISH

The rest of the day was his girlfriend and me?