If you can afford it, take time out. Travel. I was in your situation, stressed out by office job, not sleeping, depressed. So, I grit my teeth, saved for a year, and quit the job to travel for a while. You can travel very cheaply in SE Asia and meet tons of travellers, or do casual work somewhere like Australia, if you can get the visa.
Maybe it's escapism, if so, so what? Escape for a while. What's the rush anyway? It did me good to have jobs for a while (bricklayer, cleaner, etc) that I could switch off at 5pm and not think about until the next day, plus met tons of people, made great friends, discovered new hobbies, got back in shape. And... the bags under my eyes have gone