You have nothing to feel guilty about IMO. You are doing what you need to do to keep your life as you want it. Not an easy thing to do. I understand the vague guilt about beling grateful not to be in the madness of it all too. I've experienced the same thing.
Have you considered AlAnon or an ACOA group? You may find either or both very helpful to you and understanding how your father's alcoholism has affectred you.