YOU SAID:

I missed you since the day you left

INTO JAPANESE

あなたが去った日から君がいなくて寂しかった

BACK INTO ENGLISH

I've missed you since you left

INTO JAPANESE

あなたが去ってから君がいなくて寂しかった

BACK INTO ENGLISH

I missed you since you left.

INTO JAPANESE

あなたが去ってから君がいなくて寂しかった。

BACK INTO ENGLISH

I missed you since you left.