My life depression

Hi. I've never done this so sorry if its not like other ppls. Anyway, my friend recently told me that she thought I had depression, which I do but I just didnt put the pieces together. So I have depression because my whole family basically is always mad at me, I am always a dissapointment to them, always getting grounded, and constantly getting in trouble for stuff my sister did and I get blamed for. I have also gone through a lot of life changes, ppl leaving, and family fights. Im not trying to like complain about my life or whatever I just need to write this stuff down and get it out. I have ADD, severe anxiety, and depression and it MAJORLY affects my life and how I get along with ppl. My ADD causes me to miss math assaignments, whichs gets me in trouble. It always makes me think about 4 million things at once. What have I ever done wrong? Who hates me? Who are my real friends? Who are my "fake friends"? What am I gonna do tomorrow? What about in 2 days? It's insane. I just need friends who understand all this right now. Thanks