Just Vent | Just Venting

If you see this, please comment. I would like help.
..Depression is really a horrible thing.. whether it's just having a negative outlook on life or if it's actually a chemical inbalance, or both, I'm not sure. But after researching for the last few years whenever I hit my major low, I'm pretty sure I have it. I'm just a teenager and I don't know what to do with it. I feel (and part of me knows) I can't go to anyone to talk about it and I can't tell anyone about this. I feel like I should be suffering but I hate that I constantly am..I can tell it's hurting my friends sometimes, and I feel like I'm loosing them too..
But I just want to know who else is suffering out there and if you've found help/if it worked. Cause, gosh, I know I need it... I needed it two years ago...It's just getting more permanent now though. I can't help but feel hopeless about everything, and that I'm worthless and everything negative..I don't even know what to do but I figure trying to reach the advice of an anonymous person is better than just sitting in my room doing well...nothing good at least. Please comment, I'd appreciate it.