YOU SAID:

I thought you'd always be mine meaning in english

INTO JAPANESE

あなたはいつも私のものだと思っていた.

BACK INTO ENGLISH

I always thought you were mine

INTO JAPANESE

私はいつもあなたが私のものだと思っていました

BACK INTO ENGLISH

i always thought you were mine

INTO JAPANESE

私はいつもあなたが私のものだと思っていました

BACK INTO ENGLISH

i always thought you were mine