Dad not walking me down the aisle

Hi, I would like some advice. So my father has had many second chances in my life, numerous heart surgeries and surviving a cardiac arrest. When I was 16 he even told my sisters and I he wasnt planning on meeting any of our children, meaning he would be gone before that day came. Him being at my wedding 7 years later is slightly suprising. However, he never seemed to learn from these experiences. He is an alcoholic and continues to get worse each day. He e is very skinny as he drinks his calories instead of eating. I told him that if he didnt get help he would not be allowed to walk me down the aisle or do the father daughter dance. He isnt violent when he is drunk just doesnt know what he is doing, loses his memory, becomes highly emotional, and super mean to my mom.


I know many people have an issue about dry weddings but my fiance and i want one. His dad is a heavy drinker but not as bad as mine. I told my dad it was going to be dry so if he showed up that day drunk he would be kicked out. I am asking if anyone else has had the experience of having an addict family member and how you handle it? Also am I being to harsh on him?