Pros and Cons of transferring?

I go to a very small high school with about 93 students. And I started out at the local elementary school and left during the 5th grade, then came back to that school in Junior High. Now I am a freshman and when I came back last year I was so happy to be back with my old friends. I was positive that I wanted to graduate from this school with the class and friends I started out with. Now a year later, I am realizing that I am not very happy at this school and I would like a fresh start. But I don't want to leave my friends. So I am debating whether or not to transfer.