What happens next?

How to defend yourself from bullies
Make a parent aware of the situation.
Your parents can often speak out on your behalf to the teachers and school administrators. Parents often exist within the same community, and your parents may be able to have a talk with the parents of the aggressor.
Reach out to a teacher or school administrator that you trust. Many kids, especially those who are not very popular, may have a few choice teachers they really like.