You could have severe candida overgrowth from the alcohol,at the extreme, yeast overgrowth patterns many symptoms of various 'diseases'. You could have hep, advanced stage Cirrhosis (can cause weakness, loss of appetite, easy bruising, yellowing of the skin (jaundice), itching, and fatigue). Hypoglycemia (low blood sugar) also causes some of your symptoms especially dizziness/fainting and as you mentioned diabetes. Also radiation poisoning has some of your symptoms

I would have a series of blood work tests and a general go over. The alcohol is just making you worse and damaging you.