I second the idea of counselling for your daughter, as well as open and honest conversation about alcoholism (in an age appropriate way of course). You mentioned November as the date when your A left your life. It's March. That's 5 months. And there's a new boyfriend in the house...so it's a lot of change for a child.
With regards to your anger, I suggest journaling, meditation and just what you've been doing...it'll just take some time.