My sister thinks she’s better than me?

My sister thinks everything is about her. She wants everything I have from friends, boyfriends and material items. She has her own money, friends, boyfriend and even has a child and doesn’t even talk to the father. Anyways, She doesn’t want me to be friends with her friends and hides her boyfriends. When I make friends, she makes friends with them. When I have a boyfriend, she flirts with him. It’s like in her mind, when I make a friend = a new friend for her. I meet a guy= more attention for her. She doesn’t like hanging out with me because I’m not pretty enough and embarrassing to be seen with. She even blocked me on Facebook when I tried to put her as my sister on there. She sometimes unblock me, adds all of my friends and anyone who likes my pics on Facebook and Instagram then blocks me again. What type of person is my sister? toxic?
My sister thinks she’s better than me?
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