We moved a lot when I was a kid. Changing schools was hard. I had a good attitude about being somewhere new, but kids always excluded me and picked on me at first. There may be other things going on, but I'm sure you get picked on just because you are new. They all have their friends, but you are new. You might dress, act, or talk different than they are used to. You probably know things they don't, and don't know things they do. Kids can be mean. Do your best not to let them see you get upset. Ignore mean kids. Sorry, It's tough. This won't help much, but they are immature and mean, and that's lame.