Well, that kind of reaction suggests you do need some help. The first thing any good counselor will do is give you an inventory to see if you are just suffering from a bad day or if you're genuinely depressed.
You just suggested you've been unhappy since seventh grade. If your unhappiness has gone on that long, then yes, you need help. The main criteria for distinguishing depression from a simple bad day is the duration of the event.
I am unsure why every conversation with you turns into an eruption about how society is somehow malformed. You can take some solace from the fact that depression is extraordinarily common in adolescents, and it tends (for various reasons) to lift.
If you are socially isolated, this is a major contributing factor. The 'solving-your-own-problem' complex is a symptom of the tendency to treat depression as a shameful individual problem rather than a real, insidious, pervasive, and sometimes unbeatable disease. Getting help doesn't hurt, just like getting some suspicious symptoms checked out won't do any harm.
