Holy moly Frankie, you're in a world of hurt. First things first, you can't keep sleeping in an infested bed. Nothing can improve in your life if you're literally sleeping in bugs. There are home remedies you can get on the cheap that can work. I have linked one here. You have to give it a try, strip the bed spray the living bananas out of it, get some new sheets and start from there.
That has to be step one. I mean really, no improvement of mood is going to happen until you can rest your head at night without being attacked my friggin' bugs. I can't even imagine.
Step two, a job yes, but I hate my job so I can't be as positive as others are that it will help pull you out of your considerable funk. I like the idea one of the other posters said about getting a job on a cruise ship or something. If what you say is true and you have no friends, no life, no connection to where you are, a full on, all out fresh start could be the thing. Just leave. Use the next week to research some kind of traveling job. Doesn't sound like you're making much now, so who cares if it's something minimum wage. Swabbing the deck on a cruise ship for crap money takes you out of your current situation and you can figure out the rest of life later on.
Do you have a car? A quick and easy way to turn around some cash is to become an Uber or Lyft driver. If you don't have a car you can lease one and pay for it through your earnings. You can work as much or as little as you want and it's super easy to get started. This you can do ANYWHERE, so change your latitude and do some driving for a living. I know people who have been laid off that started doing this and report making more money than they were making at their regular job. Bonus, if you lease a minivan you can live in the back in a pinch. Anything to GTFO of that bug infested depression-hole that is sucking the life out of you.
How about this...join the Peace Corps. They accept anyone and I think you get housing when you're traveling around. Breathe some air somewhere else. Help some people. It sounds like anything is better than where you're at, so really, what do you have to lose?
Just some ideas from an idiot. Hang in there Grumpy Gus.
http://ecoraiderusa.com/best-bed-bug-killer/