How do you know if you're depressed?

There are several symptoms of depression. You feel exhausted. You feel sad. You feel like a failure. You feel all you have done is make mistakes. You have difficulty sleeping. The best way to find out if you are depressed is to talk to a doctor. When I was diagnosed with depression I had few symptoms.

I don't want to get out of bed. I want to sleep ALL the time. I don't want to talk to anyone and I don't want to be around anyone or go anywhere. In worse case, I feel like I am sinking in a dark whole and I can't make myself get out of it. My dad can't be still and feels like the walls are closing in on him.

When I am really worried about something and I can't get out from one thing's worries I am depressed about that. That is the way u can check. Are you worried or sad about something?

If i am depressed,i dont feel easy,i wonders all about.I dont feel like doing anything,like i dont have the energy to do something.What i feel like nothing!

I know that I'm depressed if I feel too lazy to get out of bed or to even move a single muscle. I also stay quiet and you wouldn't hear my voice the entire day or the entire moment that I'm depressed. I'm really too lazy to do anything and to say something. I think it's bad though. There's this certain feeling that lets you know you're depressed and not lonely.