You need an antidepressant. And a girlfriend of mine takes Wellbutrin, I think it is, because she was having severe anger attacks.
Believe it or not, I don't like meds, but you sound like you are down VERY low. Go to the doctor, get a prescription, and stabilize yourself while you get your feet under you.
One of the things that people look for when they hire people is NOT depression! You can write well, you have been able to catch the eye of a very social young lady, you've gotten through college (cool!), and you're having a rocky time of it.
One of the things that's wonderful about this time that we live in is that we realize that our brains are plastic and we can change how they are; we are getting more insight into things like depression; and things that seemed like permanent dead ends even a decade ago, can now be seen as bumps in the road.
Tell your girlfriend that you need to take care of yourself so that you can take care of her, and that you want to not be depressed so that you can get a job.
Oh, and also realize that you and your generation are having a terrible time,and that all of the other generations are noticing. As a matter of fact, I just heard something the other day that said that your generation is going to have more resilience and will be happier with less than most previous generations -- because you're learning how to live in such lean times.
What do they say? It's not paranoia if they're really out to get you? Well, getting a job in most of the country absolutely bites right now, it's true.
Get lots of exercise to help that anger stuff (run, swim, and so forth) -- it will REALLY help you. Don't drink a lot or take bad drugs, and make sure that you feed that awesome young body of yours. You can do this!