First I want to say you're definitely not the only one who feels this way. I know that it seems that way sometimes, but there are a lot more people who can understand and relate to what you're going through than you think. Depression is a hard thing to deal with, especially on your own. It leaves you feeling empty and hollow inside, and it's hard to feel like anyone could ever understand.
But you're not destined to feel this way. You're here on this earth for a reason, and that reason is not to be depressed. You have a better destiny than this, and I have faith that things will work out for you. The strongest people are the ones who have to deal with emotions like these ones. If you weren't strong enough to face it and fight it, you wouldn't be dealing with it.
I encourage you to talk to someone about how you're feeling, anyone in your life who you feel might understand. Give it a shot, you never know how much better you might end up feeling simply having someone there to confide in. It's made all the difference for me.
There is a way out of this, just don't lose hope in that. :)