My younger sister is rude and mean to me?

Anonymous
My younger sister is 18 i'm 23 and for the longest time she's been really mean to me. She acts embarrassed of me and then acts as if I'm stupid and she's smarter than me. When her friend is around she ignores me and they talk over me when I'm trying to join in our their conversation or talk to them. I have 0 friends and I'm a loner the only people I hang out with are my family. I think I'm a pretty nice person so I don't know why she acts mean to me. When her and her friend have problems she takes out her anger on me and acts all grouchy towards me. The other day she was talking to me and I was talking to her back and I had no clue she was mad at her friend and all of a sudden she was like ____ shhh and gave me some sort of a attitude as if she had a headache the next day I found out she was mad at her friend. I think they may be lesbians but who knows. I don't care if they care but they're really close. I've been trying to talk to her and her friend cause we're all in the front room and they're all talking over me. They even brought food from the store and didn't even offer me any. I felt awkward. They never offer their food and she always buys her stuff. well right now I was telling her something and she gave me this weird look like I was annoying her cause I was telling her about this site cause I wasn't sure if she knew how to use it or not. She told me to stop stalking them (on this website they are on) but I'm not. What do you think is wrong with her?
My younger sister is rude and mean to me?
22 Opinion