YOU SAID:

I've been cheated on you since I dont know when

INTO JAPANESE

私はあなたがいつ知っていないので、あなたに騙された

BACK INTO ENGLISH

I was deceived by you as you do not know when

INTO JAPANESE

私はいつあなたが知らないので、あなたに騙された

BACK INTO ENGLISH

I was deceived by you as I do not know when

INTO JAPANESE

いつ私が知らないので、私はあなたに騙された

BACK INTO ENGLISH

When I do not know, I was deceived by you

INTO JAPANESE

私が知らないと、私はあなたに騙された

BACK INTO ENGLISH

If I do not know, I was deceived by you

INTO JAPANESE

私が知らないなら、私はあなたに騙された

BACK INTO ENGLISH

If I do not know, I was deceived by you