YOU SAID:

I have fallen in love with my best friend who works at a restaurant who is also a masculine person

INTO JAPANESE

男性でもあるレストランで働いている親友に恋をした

BACK INTO ENGLISH

I fell in love with a best friend who works at a restaurant that is also a man

INTO JAPANESE

男性でもあるレストランで働く親友に恋をした

BACK INTO ENGLISH

I fell in love with a best friend who works at a restaurant that is also a man