31 March 2017 Last updated at 09:10 BST
That's because she has a very strong type of anxiety called selective mutism.
But she's started taking a special music class which has helped her to speak at school.
Meet Ruweyda by watching our video.
You can find out more about what anxiety is and how it can affect you by reading our guide, here.
Ruweyda is seven years old and has only recently said her first words at school.