I'm at the end of the line with my little sister! What can i do?

O wow. You life sounds a lot like mine when I was younger. My sister was always bigger than me, and she always picked on me. Now that we're older, we still have those differences. The important thing is for you to look out for yourself. Make friends, and stay out of her way. When she's at home, be out. Go to the library, to the park, read to the wee ones at borders. When you're at home, stay in your room and avoid her there also. You have a few years to go before college, and once you're outta there, you're outta there. In the meantime, steer clear.