YOU SAID:

im going to my friends house

INTO JAPANESE

私の友達の家に行く

BACK INTO ENGLISH

I go to my friend 's house

INTO JAPANESE

私は友人の家に行く

BACK INTO ENGLISH

I will go to a friend 's house

INTO JAPANESE

私は友人の家に行く

BACK INTO ENGLISH

I will go to a friend 's house