YOU SAID:
私は私の友人"いとこが好きです
INTO JAPANESE
私は私の友人"いとこが好きです
BACK INTO ENGLISH
I like my friend' cousin
INTO JAPANESE
友達のいとこが好き
BACK INTO ENGLISH
I like my friend's cousin
INTO JAPANESE
私は私の友人のいとこが好きです
BACK INTO ENGLISH
I like my friend's cousin
That didn't even make that much sense in English.