I just Can't take it anymore. Anything?

My family don't understand me. They hurt me so much. But still I Smile and don't show them anything. My brother is the only one who supports me. In school also, no one seems to be understanding what I'm going through. They tell me, how will they understand if I don't tell them anything?? But when I opened up, all they said was that I am doing drama. I cut myself. I have more than 10 cuts on my wrist and my stomach but no one in my family knows about it. If I ever told them , all they would say is that I'm over reacting. I have a best friend whom I love more than I Love myself and a brother for whom I can do anything. But I hate everyone other then them. I just don't know how I'm going to survive them. Suicidal thoughts keep coming to my mind. Now All I wanna do is just end it all. Because I'm just tired of everything, the everyday drama, the smile I have to put on my face, the fake laughs and the silent night cries. I just don't know what to do