I cant get along with people?

I was an outsider in school, too. Stop hanging around the "not-nice" group of kids you know now and seek out others. Are there some other people in your school that are also shy and "outside" of the cliques and groups? Take a deep breath and approach them. You can use things that they say in cl as a starting point, like "I liked it when you said (blah blah) in cl today. That was really smart." Join clubs that do community service. This will give you common experiences to talk about. Another thing to remember is that you will find it easier to make friends in college. High school kids aren't so mature. Plus, when you go away to college, you can get away from that stupid sister of yours! So try to keep up your school work, and be patient. It does get easier as you get older. Just keep trying to meet people, and feel free to observe them a lot before you decide to go up and start a conversation. It gets easier with practice.