AITA for not allowing my nephew to walk me down the aisle at my wedding?

I (f27) got engaged last year and we’re planning to get married this summer. <br><br>I have a brother (m34) and sister (f31) and between them, they have five kids. I am very close to all of my nieces and nephews. <br><br>Before I even had a chance to ask any of them, my brother’s son (my nephew, m17) came to my parents house and asked if I would like for him to walk me down the aisle at my wedding. I was very touched by this gesture and I was so happy to say yes. My son would be my flower boy, my daughters would be my bridesmaids and my mom would carry my grandmothers handkerchief. <br><br>The problem is my dads feelings. He and I aren’t close. I have tried to develop a relationship with him but it just isn’t happening. What’s worse is that he is an alcoholic and a smoker and it makes him reek of smoke and booze. He is also very unpredictable and I can imagine him getting drunk at the reception. The reason why this is all important is because my fiancé and I have decided we don’t want him at the wedding. We have known about this for a while. <br><br>My dad found out a month ago that I was getting married (from my mom) and without asking me if it’s okay first, he went straight to my brother and told him that as my father it was his right to walk me down the aisle. My brother told him that I had already asked our nephew and he said that he would talk to me about it. He tried to talk to me about it but I said my decision was final. He then asked me if I had considered that it would hurt my dads feelings and I responded by saying I didn’t care, and my dad doesn’t deserve to be there. <br><br>My brother then told my dad that I had said no and my dad then went to my mom. She told him the same thing. My dad hasn’t spoken to anyone since except his new girlfriend. <br><br>AITA?