I went to four different grade schools and four different high schools! It's challenging to make new friends and feel like you fit in. A period of adjustment is normal. I am about to go to FL for the winter and I'm psyching myself up for the change. It helps to practice smiling and just saying "hey" to other students, because a smile is the best icebreaker. If you get a phone number, be the first to text/email. Go out of your way to make friends. You are learning social skills that will serve you well for the rest of your life. Hang in there. This is a temporary situation.
We moved around quite a bit when I was young as well, and it's definitely not always a fun process. These days it's actually a lot easier to keep in touch with your old friends, so at least you can still talk to them without it costing a fortune (or having to send snail mail like I did).
Best thing you can do is just be open to meeting new people, see if there are any activities at your new school that you can join, and just jump in. If you can get to know one or two new people, then they can help you make some more new friends there as well.
You should be open to the differences and also be flexible to change. Understand that people do things differently and be willing to learn new things. Avoid criticizing others too and this way you will be in position to adjust to any new environment. Read more from: http://www.tips4students.com/cultureshock.htm.