NYC are you even sure that girlfriend is actually an alcoholic? From what you have posted it seems that she is certainly abusing alcohol at the moment, but please don't fall into the trap of thinking that you are able to diagnose her. That is not fair on you or her.
Originally Posted by
LaTeeDa 
"Why do I want so badly to have a relationship with a selfish, lying, manipulating person?"
It doesn't really change anything by putting a label on the cause of HER bevavior. However identifying YOUR behavior and its drivers will reap reach rewards.