Carlos, hello, and welcome to the forum. I am sorry that your wife is suffering from the effects of long-term alcohol abuse. It's strange, but when people are depressed, they tend to reach for something that depresses them even more: alcohol. Alcohol is a central nervous system depressant, so while she may feel a temporary lift in mood, the "crash" will be worse than she was originally. Then you add on the physical effects and it's not a pretty picture.
Has your wife been evaluated by a hepatologist? If not, that might be something to have done, to determine just how much damage has already been done to her liver and other organs. I also suggest you read the information in the folder, Hepatitis Resources, at the top of the page. It is not just about hepatitis, but other forms of liver disease, as well. Some of the older posts regarding alcohol will also be informative. But it will take a physician's evaluation to determine the exact extent of her physical problems. If she is not on antidepressants, she probably should be, so evaluation by a psychiatrist would also be something to consider, although a primary care doctor can also evaluate depression and prescribe for it.
it will be hard when you are by yourself, trying to cope. But everyone is her for you. This forum has been a godsend. You can vent out, cry if you like, anything that helps you deal with your emotions. Somebody might have been through the same or similar , they might be able to help, even understand some of the pain you are going through.
It must be awful trying to deal with losing your sight alone, they do say that all your other senses become more aware, again people who have been through losing their sight, how did they cope, was there anything that made life easier for them? there should be specialists in this field that can help guide you both through this traumatic experience.
I love your quote, but maybe its not your time to let go!!!