YOU SAID:
my girlfriend loves my best friend
INTO JAPANESE
私の彼女は私の親友が大好き
BACK INTO ENGLISH
My girlfriend loves my best friend
INTO JAPANESE
彼女は私の親友が大好き
BACK INTO ENGLISH
She loves my best friend
INTO JAPANESE
彼女は私の親友を愛している
BACK INTO ENGLISH
She loves my best friend
You should move to Japan!