I think I want to give my sister attitude.
How would you give your sister attitude?
I'm going to behave quite hostile towards her. Which means, I will try to avoid her as much as possible and I will barely talk to her.
Siblings have disagreements, but being hostile and limiting your contact with your sister creates even more disharmony between you. I think you should talk to your sister about your issues with her instead of being aggressive.
She doesn't want to try to work on any of our issues, though.
It's unfortunate that she doesn't want to try to make amends, but I still don't think that acting rudely towards her is the right thing to do. Maybe you could ask for help from one of your parents, or another family member.