use it as a chance to make new friends. join some groups for your senior year to do outside of normal school. music, dance, arts, sports, cars, shop, whatever. do something you have interests in, when you do that, it's easier to make friends whom already have similar interests. say hi to the kids next to you in class and that you just transferred. see if they have lunch when you do and ask to join them. be brave. there are ALWAYS new kids at the start of each new year. and this could be a good experience to try new things and get out of your comfort zone a little.