I hate my sister? please help?

i hav a younger sister(2yrs younger) who has made my life a hell.she has hurt me many times anddoesnt even say sorry and doesnt even care bout nythng related 2 me.she has a lot of attitude and vry arrogant.shez vry blunt while talking wid me.My Prob iz that i want to be strong enough not to feel so bad with whatever is happening. Please help