I'm so sorry you're going through this. The first thing we learn in Alanon is the 3 C's: You didn't Cause it, can't Cure it, and can't Control it. You have NO power over his disease. It is progressive, and will only get worse with time. I am actually glad his family is not getting involved. Obviously, for whatever reason, they are keeping boundaries and staying out of it. Too many families jump in to try and "save" the A, that kind of enabling only prolongs the process.
You can't save him. If he wants to drink, that is his choice. Adults have the right to make their own choices, even when they're bad ones. But they also need to be allowed to experience the consequences of those choices. That's where it's important for us to step aside and let them go on their path.
The ONLY person you can save, the ONLY person you have control over...is YOU. You can decide that this is not the life you want for yourself, that you deserve peace and happiness. No on should live afraid in their own home. Don't give up that new job. Of course anything you do that might make you a little more independent is going to aggravate the A, don't let that keep you tied.
Find an AlAnon meeting near you...and go! You will find a room full of people who totally understand your situation, and will offer their experience and hope to help you move forward.