Spoty, I hope I won't be repeating the answers above because I really can't go through all the posted answers to the questions I answer!

Anyway, I want you to know that my heart really goes out to you. I know how you feel because I, too, have issues with my father.

I encourage you to keep talking to someone. You can find a Christian counselor who would not charge you for the counseling sessions. Your dad will always be the same because it's too late for him to change. But you can change your way of thinking of the whole matter.

Sometimes it's good to stay away from home if it causes you much stress and pain. Find some things to do during the summer: sport, voluntary work, camps, etc.

Try not to let his words hurt you. I mean don't care so much for what he says because it's his own problem. I do feel sorry for him though. He must be a victim of the circumstances he had lived in. However, it's our responsibility to decide who we want to be! 

It's great that you see his good side. And you know what the good side of the whole situation is? You can feel for hurting people :) 

Pray that God may reveal Himself to you as the Heavenly Father. When you feel that God is "your" Father, it makes things better. And also believe that God will show you gradually why He allowed you to have such a father and to go through all this because all things work together for our good.