We have an incredible capacity for denial and self-deception. For years, I would periodically drop into severe depression; I would stop sleeping, stop eating, stop answering my phone or email. I wouldn't leave my room for weeks on end; on a few occasions I was so successfully reclusive that people worried that I disappeared or died called the police to investigate. A few times I almost did die; I think the biggest re…
I'm noticing some alarming similarities between your description and my current situation. Shit.
Don't try to diagnose yourself from this: the point is to let it sink in that you have an issue, and it's not going to get better unless you do something. Don't skip this step. Now that you're convinced, start hacking at the problem.
I recommend http://www.amazon.com/The-Depression-Cure-Program-without/dp...; but do your own research, talk to people, get better. Get better every day. You'll fail several times along the way; have people you can count on for help. Get better every year.
Maybe it will be an easy, short road for you. Maybe it will be a life-long struggle. That's okay, just make sure you live long enough to find out; it will be worth it. There's only one thing you need to know: problems you ignore won't go away.