Suggest Treatment For Anxiety, Depression And Negative Thoughts In A Teenager

I m starting high school day after tomorrow, I have no friends, and the past year my social life has messed up the educational part of school for me. the past few days now I could barely eat. I slept for 11 hours. I ve been in bed for days together. my parents say it s just laziness, I can t take it. I know they love me they tell me that all the time, but I cry every single day. From the past month I ve been crying in the shower so no one could hear me, but it s the end of summer now and I can t hide it anymore. The past summer has been the worst as we couldn t go for a vacation whole summer, and my grandma died at the end. I hate myself, my body image and everything about me. I tried talking to my parents, but they don t believe in home schooling. They think that this is all just drama and I m just being lazy. I hate school more than anything, and it s causing me depression and anxiety. Please, please help me, I really need a fast response from anyone who could help tell me what I have or am going through. I don t know.