Anyone else have one person they can't stand all of a sudden?

Gabbi
My older sister recently moved in and i don't know what it is but almost everything she does or says makes me angry or annoyed and i try to keep my cool because sometimes there's no reason for me to even be mad at her but i can't help it, it's like as soon as i see her or hear her talk i wanna attack lol and then i feel bad afterwards for acting like a psycho.