I understand what you are going through. I agree with Fharriage that you may possibly have a learning disability that makes math difficult for you. There is actually a name for this: dyscalculia. A Bing search should yield some helpful information.

Whatever you do, show initiative by asking classmates for help. Don't give up, and don't look at yourself as defective. It may also be that you have not had anyone show you in a way you can understand.

Good luck! ��