YOU SAID:
My girlfriend is the best and I love her so much
INTO JAPANESE
私のガールフレンドは最高です。私は彼女をとても愛しています
BACK INTO ENGLISH
My girlfriend is the best. I love her very much
INTO JAPANESE
私のガールフレンドは最高です。わたしは彼女をとても愛している
BACK INTO ENGLISH
My girlfriend is the best. I love her very much
That didn't even make that much sense in English.