I'm being dissed/ignored all of a sudden by my stepsister
My dad has a girlfriend and she has two kids,one is 9,the other is 16. They recently just moved in with us. I share a room with the 9 year old. We used to have a lot of fun together. But now,all she does is sit around and acts like I'm not here. And if I even get to talk to her she just immediately walks away. One day, whenever I did talk to her she'd talk smart or yell and get angry.I've told her mom but all her mom does is fuss and says I have an attitude when I don't even do anything. The most irritable thing the 9 year old does is just make a bad situation worse by saying some inconsiderate things. I'm very sick of this, and I want us to get along more.My dad is upset about us not getting along too. What should I do?