You could well be depressed, as the symptoms you describe fit. I agree with Rohag that it would be good if you could have a chat with a doctor and explain a bit more about your situation, feelings etc.

From personal experience, I know that anger (which is currently very bad with me) is a huge part of depression. Saying that, depression is experienced slightly differently by everyone and some aspects / symptoms of the condition are more prevalent with some people than with others.

I wish you all the best, Starshine!