Anger Is Definatly Not Helpful

I get discouraged really easily, and I did this well before I showed any symptoms of depression. But now that I am depressed, my quick temper seems to make everything much worse. It is though I have lost any control of my emotions, and no longer can keep them in check. Not only does this make me feel terrible, but it has started to put a toll on all of my relationships with people.
I have four best friends who I go to school with, and I have two others who I call my long-distance best friends. I have more then four friends in school, but I am quickly losing them. I used to be able to hold my tongue and all of my sarcastic comments. But now, it is though, the second they start to complain or whine, I jump on them. I have become so much more irritable, and I do not know how to change. I am afraid that, if I can not change, and control my temper better, I may end high school with no friends.
What is even worse then how I over-react and get mad at my friends, is how I over-react and get very angry at my mother and father. I have yelled at my mother, causing her to get angry at me, and not talk to me. But, my biggest problem is when I clash with my father. We have a difference in opinion, and we go off. I have stoped trying to yell at him, or get him to see what I am trying to say. But after he yells at me, I am full of resentment, and I hold on to my anger. This clouds my judgment for the rest of the day, or week, and I do things to purposfully annoy him.
Yes, I hold a grudge. I do not know how to let things go. I can not be the only one who does this, can I? Do any of you have similar problems? Is anyone else really angry, all the time?

The Girl Uninspired