YOU SAID:
it's been one week since you've looked at me
INTO JAPANESE
あなたが私を見てから一週間が経ちました
BACK INTO ENGLISH
It's been a week since you saw me
INTO JAPANESE
あなたに会ってから一週間が経ちました
BACK INTO ENGLISH
It's been a week since I met you
INTO JAPANESE
あなたに会ってから一週間が経ちました
BACK INTO ENGLISH
It's been a week since I met you
That didn't even make that much sense in English.