YOU SAID:

I forget about you long enough to forget why I needed to

INTO JAPANESE

なぜ必要だったのかを忘れるほど、あなたのことを忘れてしまう

BACK INTO ENGLISH

The more I forget why I needed you, the more I forget you

INTO JAPANESE

なぜあなたが必要だったのかを忘れれば忘れるほど、あなたを忘れてしまう

BACK INTO ENGLISH

The more I forget why I needed you, the more I forget you