I suppose I realized that there was a way out. I felt trapped by everything in my life, and only when I let go and left my situation did I realize things can be better.
When you are so deep dug in your pit, you often don't realize that you are still the one in control. You can look for bits of things that make you content, even if very briefly, and those give you the strength to enjoy living again. Maybe just the color of the sky at dawn or the company of a pet.
Well anyway that's what happened to me. Having something to take care of (that doesn't speak, preferably) can also help you out of your spiral.