I was really depressed for a period of about a year and a half, but I never recognized until after I got out of it (which I did by making a few major key changes in my life). A couple signs you can consider are:
1) No interest in doing anything with anyone. Do you come home from work or have a day off, but never want to go out and do anything? Do you turn down (or have an initial gut reaction to want to turn down) invitations to visit family and friends, but can't figure out why you turned them down? This is a big one for me. I can remember back then, my parents would call and invite me to come out to their house for a barbeque. I love my parents and the rest of my family dearly, and love spending time with them, had nothing else going on, but found it VERY DIFFICULT to say yes. For some reason, I wanted instead to be at home doing nothing. There's a
Blue October song that talks about recognizing and overcoming this feeling. Lyrics say: "I've been talking to my aunts and uncles, mom and dad again / I've been finding out that I have what this world calls friends / I've tried to push them all away / They push me back and wanna stay / And that's one good thing I have."
2) Not really caring about anything. If you're depressed, you won't really feel sad. You won't feel anything. It's like your emotions are stuck on a bland spot in the middle.
If you choose not to decide, you still have made a choice.
Lassev: I guess there was something captivating in savagery, because I liked it.