YOU SAID:
I'm meant to be yours
INTO JAPANESE
私はあなたのものになるつもりです
BACK INTO ENGLISH
I am going to be yours
INTO JAPANESE
私はあなたのものになるだろう
BACK INTO ENGLISH
I will be yours
INTO JAPANESE
私は彼のもの
BACK INTO ENGLISH
Then I will be yours
INTO JAPANESE
私は彼のもの
BACK INTO ENGLISH
Then I will be yours
You've done this before, haven't you.