YOU SAID:
i like this guy but he doesnt like me back
INTO JAPANESE
私はこの人のことが好きですが、彼は私を好きではありません
BACK INTO ENGLISH
I like this person but he doesn't like me
INTO JAPANESE
私はこの人が好きですが、彼は私のことを好きではありません
BACK INTO ENGLISH
I like this person but he doesn't like me
You've done this before, haven't you.