she needs help.

My younger sister was raped this past school year. She is a freshman and I am a junior. She was raped by a guy in my grade. Although this happened in November, my family and I have just now discovered the truth in January. It breaks my heart to see her so upset. She wants to handle it by herself, but she can't. My mom has even been through the same thing, but my sister won't let her help. I know she wants to be strong, but she can't get through this by herself. She was even friends and did make out with the guy before he raped her. He also hit her. I just don't know how to help her, because this is sending my family through great distress and depression. I know that it will take time for her to heal, but she won't even start out the right way. She believes that everyone at school hates her, which isn't true. She's popular, and only the popular kids hate her. She needs to make new friends but isn't giving anyone else a chance. I don't want her to switch schools, because this is not her fault. I feel like I can help fix this by talking to the guy who raped her, but I don't want her to get mad at me. I don't know what to do. But I know that she needs help.