Carlos,
I didn't go through the same level of dementia that your father had. But, when my mother was sick with cancer she had alot of dementia at the end. It was the hardest thing I have ever had to watch. We had to put her in a hospice at the end of her life. It was the hardest thing we ever had to do... and after she passed I went on a self destructive path of drinking and doing ALOT of drugs. I didn't want to feel/deal with my emotions so I shut them down (as best as I could being that they were still there when I came out of the bender). I say all of that to say drinking isn't going to solve any of your problems. Obviously you know how to keep yourself clean. Allow others in and accept help. Deal with what you are feeling and be proud that you are doing it sober.
Congrats... and keep going I am 10 days behind ya with 51 days.
Saliena