How to deal with my sister??

Now I know how it feels when your youngest sibling copies, follows you around, and slips in a few 'secrets' (things others shouldn't know!) about you to their friends!

Except this is happening the other way around, can't you believe it?

I am the...

young sister and at one time I have copied everything my older sis has done but that was wayy back when we weren't even best pals. She'd turned her friends against me and start rumors about me. Everything in her power to ruin my childhood. Now years after losing those friends, we have grown closer and kept everyone out of it. Like a little 'we' time like sister like sister you know?
Then. . . She got a car, then came friends and plans. She Owns everything. Actually she acts like she does. I like to call her 'house theif' because she would grab anything she liked that went lying around and keep it as her own.. Even my Hair Comb! . . and for days I wonder where it went.
I would've never thought things would get too uncomfortable for me. She owned all her friends and she was their 'Main' girl. When I'd meet up with her friends, they'd hug Her First which proved that and always call or text Her. I have nothing to do with it. Still. She also has a cat named ' Sassy ' that she shows off in front of me. I KNow what she's doing. . trying to make me jealous. My cat died long ago so I never have anything to cuddle with =(. She'd cuddle up with her in front of me and then look at me to see if I am getting jealous about it like Look at me, I have a cat and you don't. sort of thing. It makes me mad but I know I should'nt let it.
All I am asking is for 'SPACE' because she is beginning to cross the line. The downside of this is that she can hang out with her friends and they take her out. She invited me to befriend them too, but I want my OWN friends to hang with. I do have friends, but sadly they live far out in other states. I don't want to seem 'Selfish' but I think there is nothing wrong with having your 'own friends'.
I even told her Thanks but I rather have my own friends and she began to tear up like I offended her. She acted like if I ever get friends they have to be Her friends too which upset me quite a bit. Like I said, she acts like she owns and dominates everything surrounding her. It's quite annoying when I eye a man, She happens to be eyeing the same one and takes over by getting his attention. Ugh!
Or she'd take my personal books and Copy stuff from them and send them to her friends!. . uhhh, Those qoutes are Mine. To Explain better , I found an old antique album with poetry inside at my Grandparents house and I hid it so my sister wouldn't copy from it. I called the poetry my own and my secret. Well, Somehow she found it and began flipping through it and copied EVErything from it into her notebooks. On Grandpas birthday I decided to take a beautiful Personal poem from it and write it in his card but then got a strange feeling. . . that is when my sister popped out and said, How do you like this poem I wrote for him and it was the SAME exact poem. That's how I found out. We pretty much were about to send him identical B-cards.
I had to erase mine and think of something corny to write like the common Heya Hope you have a nice birthday sort of thing. I prefer my sayings unique and like no other but that hasn't worked out.

If I had a car. . I would be able to be out on my own, my space, my friends.

I love my sister greatly and we hang out a TON and take eachother out to eat. I have no choice but to be with her if I want to get out of the house since my parents work full time. She expects me to live with her since we're so close. She's a light sleeper and I love making noise. HELPPP!

You need to tell her how you feel. If she tears up, so what! Sisters are supposed to support each other, not steal each others stuff and taunt you. She's crossed a line; it's time to stand up and lay down the law. If you don't, she'll keep doing all the things that she's doing now and you don't want that. You don't have to yell and scream but tell her that you're really sick of the way she treats you. It's wrong and it's and ugly thing to do. I know you may not want to hurt her feelings but think of all the things that she has done to you. She stole a poem and said that it was hers! That should really piss you off. Make a list of all the things that she does and tell her. It'll be like a intervention. She needs to make a few changes,but she won't do it unless you express to her that she is hurting your feelings. It'll be hard but it's worth it.