First, make sure you are connecting with your people, whom ever that may be. Ask for help. The most drastic thing you can do is to change your environment. At a particularly low point, after a group of my friends perished in a helicopter crash, I shed most of my possessions and left for New Zealand, where I found work on a property that was developing an "edible forest" with livestock. I rebuilt myself on the inside, from there. If you really need a drastic change, picking yourself up and leaving allows you the abandon all of the factors that were contributing, in the first place, to keeping you stuck in a negative feedback loop. Shuffling your environment isn't without challenges of it's own. Portable hobbies are necessary. Reaching out and meeting new people is necessary. People of value. Like a church, or something. Otherwise, isolation sets in and "culture shock" takes a while to wear off. Music is the easiest portable hobby. Depending on how much you have saved up, Tonga is pretty cheap and relatively safe. It's Wesleyan and Mormon, almost entirely. There is no work, but you can feed yourself from the ocean. I did that for a while. I don't know if the ARK is still there (https://thekingdomoftonga.com/the-ark-gallery/) but the couple that lives there has great advice on how to get by.