Dilemma

How do I tell my mother
That I constantly stay away from the house
and come home late, or not at all

Because I cant stand my sister?

I feel terrible saying it. But it is true. I Love  like my sister- as much as the * insert something here*

But I don't think I want to be her friend.
Basically if I had my way- I would have little or no relations with her.

I mean- I'm sure she is a good person.

But we just are not meant to be.

How do I explain this to my mother without upsetting her?

Million Zimbabwean Dollar question.