YOU SAID:
i like her but she doesn't like me back
INTO JAPANESE
私は彼女が好きですが、彼女は私が好きではありません
BACK INTO ENGLISH
I like her but she doesn't like me
INTO JAPANESE
私は彼女が好きですが、彼女は私が好きではありません
BACK INTO ENGLISH
I like her but she doesn't like me
That didn't even make that much sense in English.