Someone is using another person to hurt me and I'm going to tell them that what they're doing is wrong.
What reasons make you believe that this is wrong?
It's wrong to use someone to hurt another person.
It commendable to put your foot down and stand up for yourself to those who bully you. You should be direct and assertive.
Thanks for the advice.
I hope this works out for you as it's unacceptable for that bully to use someone else in such a selfish manner, especially when their goal is to hurt you. Standing up to this bully might prevent others from being bullied by this person in the future.