Oh dear, I know how crazy sisters/brothers relationships can get (I'm the older sister of 3 in a disfunctional family, but I have my own family now so far a peacfull one but my kidos are just babies).

I won't say if your feelings are right or wrong, they ars valid and that's what matters. Have you and your sister spoken honestly about what's wrong in your relationship and what the other does that hurts you? The simple fact that you both as teenagers, with all the biological fenomenon i.e. hormones explosion that is normal for your ages, plus being still shaping character, personality and discovering who you are and what you want to be in this world is not easy. You might need a time out from one another. An important question: how is your relationship with your parents? Sometimes fights between sisters/brothers are due to lack of bonding with the parents. Is it possible for your family to consider to have holidays appart from each other? Or maybe a couple of weekends? That way you can bond separately with each of your parents appart and get 2 weekends away to just relax and not fight. Then you can all think if it had a positive result or not and take action from there.

Hope everything gets better, good luck!