No matter what your parents tell you you are not weak or worthless you are a beautiful person who deserves so much better then you are getting. I know you want to forgive them and i know you love them cause they are your parents but they have crossed the line, a long time ago. I think you should definitely tell someone, you need help. Your parents need help. There is no one in the world who deserves what you are going through. And there is so many more ways to deal with the pain then cutting your self, you need to tell someone, Someone who can get you out of there. if you ever need anything at all feel free to
PM me.