It sounds like you'd rather drink yourself into the grave than risk what happened to your father - except that excess alcohol consumption is a risk factor for strokes, and you might well also have inherited risk factors.
If you want to minimise the risk of suffering what your father did, moderate your drinking, give up smoking (if you do), lose any excess weight and togeather with your GP make sure your blood pressure & cholesterol are within acceptable limits, eat plenty of fruit & vegetables and take some exercise - e.g. live a healthy lifestyle.
Of course that might all sound very boring to you, but it is the best way to avoid stroke/TIA/cardiovascular problems, all of which can kill and all of which can greatly limit your lifestyle.
Personally I wonder if you are an alcoholic. You don't have to be rolling drunk on a regular basis to be an alcoholic 0 indeed you never have to be drunk. Presumably you know the health risks of the amount you are drinking (I imagine your GP has outlined them and there are several others beyond stroke etc.) but are unable/unwilling to reduce your intake. To me that sounds like some kind of dependance.