Not for quite as long, but I’ve been there my friend.
I don’t know how to tell you how to alleviate depression, but I can say that if you manage to, things may look drastically more hopeful afterwards. When you’re really truly depressed, the idea that things can get better just doesn’t make sense. You can’t trust your ability to judge that though because when you’re depressed the part of your brain you need for that just isn’t working right. It’s not capable of telling you whether normal happiness is possible, you no longer have the tools you need to judge things accurately.
If you’re like I was, your depression also tells you that you are special in that the ideas that work for a lot of people who go down a path of trying to get better just wouldn’t work for you and it will take any minor setbacks as proof of the same. Your depression isn’t exactly lying to you, it’s just stupid and it’s not qualified to determine that.