YOU SAID:
boy i really love my cousin
INTO JAPANESE
少年は、私は本当に私のいとこを愛してください。
BACK INTO ENGLISH
Boy, I really do love my cousin.
INTO JAPANESE
少年は、私は大好き私のいとこです。
BACK INTO ENGLISH
Boy, I love my cousin.
INTO JAPANESE
少年は、私は私のいとこが大好きです。
BACK INTO ENGLISH
Boy, I love my cousin.
That didn't even make that much sense in English.