Stressed

I'm 15 and I have no parents, they are both dead but I manage and live with my sister. But the only people I'm happy with is my aunt, cousin, and my close freinds. Turns out my sister wants to move all the way out of state and now I don't know what to do! I won't be able to take that. Plus the fact I hate living with my sister and all she does is leave her four kids with me to watch them and take care of them while she goes and parties. There no food in the fridge or anything but my sister will go and get her nails done and feed herself. My aunt says I should go and get emancipated but idk if I can handle that when I turn 16 my life is miserable and I don't know what to do. I'll be away from my boyfriend and all the people who keep me sane.