YOU SAID:
my boy bestie is in love with my bestie
INTO JAPANESE
私の男の子の親友は私の親友に恋をしています
BACK INTO ENGLISH
my boy best friend is in love with my best friend
INTO JAPANESE
私のボーイフレンドは私の親友に恋をしています
BACK INTO ENGLISH
my boyfriend is in love with my best friend
INTO JAPANESE
私のボーイフレンドは私の親友に恋をしています
BACK INTO ENGLISH
my boyfriend is in love with my best friend
You've done this before, haven't you.