It must be very difficult at to be losing you daddy. Of course it hurts so much and of course you are missing him. And it hurts even more during the anniversary of his death. But how does that make you responsible for his death? It was meant to happen and it did. Nothing you could have done could have changed this. So, what do you say? Wouldn't he have wanted you to stop crying and concentrate on doing something he would have been very proud of you, like really doing well at school or doing something else that you are really good at, sport, or art or athletics? I think he sure would.
Besides, he would have wanted you to be happy and remember only the good times you had together not feeling responsible for something you had no control over.. So get on with your life and if you feel sad, which is normal and ok, try to do something that will make you feel better so that you can find peace and TIME WILL HEAL YOUR PAIN. Trust me. Time always helps.
Good luck and take care of yourself please.