YOU SAID:
I want a boyfriend so bad
INTO JAPANESE
私は彼氏がとても悪い欲しい
BACK INTO ENGLISH
I want my boyfriend to be very bad.
INTO JAPANESE
私は彼氏にとても悪くなってほしい。
BACK INTO ENGLISH
I want my boyfriend to be very bad.
That didn't even make that much sense in English.