loobyloo6624 there has been lots of good advice on here - it is definitely down to you to take first steps but I am sure family will help when they realise you are serious. GP, CAB are good starting points also Social Services may be able to offer solutions with regard to perhaps having him removed as he is a danger to himself & you.
My lovely DH died 3 years ago at age 72 leaving me a widow at 57, he was an Alcoholic & suffered from Depression. After we moved (downsized) to a new area he seemed to deteriorate, he was never abusive but all he wanted to do was drink & sleep, no interest in washing & little interest in eating (typical Alcoholic), I battled on as he had come out of severe depression in the past. Sadly he fell out of bed early one morning & could not get back in (nor could I help him). Ambulance called & he was admitted to Hospital with Pneumonia, during his Hospital stay it was discovered that he had Lung Cancer & ended his days in a Nursing Home.
I could not have coped with years of my life the way it had become so I cannot imagine how awful life is for you. Have courage, you will survive with help & advice - don't be downhearted if it doesn't all happen easily, but tell yourself ever step you take is another step to regaining your life.
I have now moved again (to another new area but near DD & her family) but have made lots of new friends & loving the challenge, enjoying being able to please myself - it's so liberating 