I am sorry you are going through this. I also grew up in a similar family situation. It has taken a long time for me to understand that I am not responsible and ultimately CAN'T fix my family's problems even though I really wish I could. I have tried in vain for many years to sort the issue all out and in doing so made myself feel miserable in the process. The only thing you can do right now, especially if you are feeling this way is to try to take care of yourself. If you can try to study in a park or somewhere that you don't have to be around the constant fighting as much at least until you can start supporting yourself and move out. I am sorry again. Things will get better. Just remember you can never fix someone else's problems for them. Only they can do that.