I can't live life anymore?

I have been having severe depression for 2 years and now I'm at my breaking point. I don't want to go to school anymore because I go everybody is so happy and laughing while im crying in the inside. I also self harm and I have an eating disorder. I am going to therapy but its not really helping. I have told my parents but I just make them more stressed out so I don't really talk to them. my brother and sister bully me all time. I just tired of crying and feeling sorry for myself. I just don't know what to do.