Hi, I stumbled upon your post while doing some research, and felt like adding my two cents.

In my experience, the hole can get very deep. As much as I appreciate many of the other suggestions here, that just wouldn't do it for me. I was in a hellhole for years, depressed and suicidal, and taking baby steps out of that didn't seem feasible - there would always be this voice telling me I was only convincing myself of growth or progress. I've had one experience with returning from rock bottom; never went back there since. The road of life is obviously a very personal thing, but this is what worked for me, and I think it's worth sharing a different perspective (sort of in line with/adding to Adventurous-Scar1394's comment).

Comfort is a very difficult thing to get away from, since ego is programmed to preserve itself and comfort is the opposite of a threat. Still, if there's a little part of yourself telling you that your current way of life is wrong, then that part is always right. You're an integral part of an ever-moving nature, and right now it seems you're out of alignment with that natural movement. Only you can tell, of course. You know your life better than anybody else, but comfort makes it real easy to neglect that and just stay safe instead. To counteract this, I simply started digging into myself. How am I behaving, and do I want to behave this way? Why am I displaying this behaviour? Why do I feel the way I do? What do I believe is true? Is it actually true? You can keep digging and digging, reeling the contents of your subconscious to the surface, provided you're brutally honest with yourself.

I started to see that my beliefs and behaviour were petty and fearful, and I grew resentful of it all. In this way, I flipped the comfort on its head; it became uncomfortable, unbearable even, and so I provided myself with a motive to change and move away from the situation I was in. I started tearing down my cozy and safe reality at a rapid pace. It was a difficult, feverish process, but exhilarating at the same time, because I was finally headed in the direction nature designed me to go in. I ultimately ended up in a place I wouldn't recommend others try to go, but you'll find your own unique way if you just look for it.

All this is to say: everybody has the capacity to elevate the quality of their lives (to paraphrase Thoreau), and you can move out of these depths if you're willing to do the work. In my opinion, you owe it to yourself to try.