I feel bad for blowing off my dad, but....

[WTC]

This is a hard issue to deal with, as most people that abuse alcohol choose not to listen to those around them to stop.
If he doesn't want to get help, it will be very difficult for you to get him to help himself. It starts with him sacrificing the urge to stop/get help.
You need to show him the damage he is causing. An example needs to be layed out for him so he can actually witness what he
is causing to you & your family. Speak with a rehab center to get some basic facts on alcohol abuse and point those facts out to him
Do not be mad at him, He is remorseful for what he's doing if he's apologizing. Its an addiction he is in to deep. He realizes this.
Confusion is what is not motivating him to stop. He needs someone to physically point him in the right direction. Because just telling
him "you need to go to AA" is not going to work. How about set up appointments for him to AA classes, go with him the first few times
until he gets adjusted to it. He can most definitely stop drinking..He needs to lower it down a tone.. a beer or 2, some food, some wine..
Until he just does'nt crave it anymore. But most important your family is going to need to help him to get up and go get help for himself.