Let's see, I have been and I think I still am depressed. I can't really recall, when I was truly happy in my life, which worries me. Anyway, I too, am quite analytic in all things, so I have though about why I'm depressed. Here's a few reasons:
I had been doing quite good at school during primary school, so I was proud of myself as I met my own standards. When I went to high school, everybody were atleast as intelligent as me. I could no longer feel superior or even good compared to others. Also my grades dropped, so I got depressed and stressed. I'm still very demanding of myself, so I feel really bad if I don't do well in everything. Obviously it's not possible to be perfect, so I feel bad.
Also, I feel myself physically weak, as I have always been skinny. I can't do well in any physically demanding things, which annoys/depresses me. Couple that with the mandatory military service I have to do soon, my future doesn't look too interesting.
Actually I see before me another boring and pointess year, with nothing interesting coming. Just more studying...something boring, maybe getting a job and getting money, getting a house and living along just like everybody else have for who knows how long! And I haven't been able to do anything about it, I never could! I haven't been able to "get into" anything for a long time, nothing has piqued my interest, etc, etc...
See now, this over-analyzing isn't good for you. It sertainly doesn't help you, it doesn't help me! Fortunately, I have good friends, and I can spend time with them and forget my worries for a while. Listening to music or reading an interesting book does the same. If I could find a hobby I like, things could be better. Fortunately I'm not studying now, so I'm not that stressed as I used to be.
TL; DR: Yes I have and still am. Spend time with good friends, read interesting books or play games to get your mind of your "oh so miserable" life. Or get an interesting hobby. If you think it's serious, get professional help, you don't need to feel that bad, if it can be cured.
Edit: also, don't try to belittle or deny your problems. They will eventually get out, one way or another. And, maybe it could help to have someone who loves or admires you, as you are and no matter what you are like. Someone else than you family. It could make a world of difference.