Sometimes it means more to a person when someone expresses extreme disappointment in them, rather than anger. I think you should let her know that you are very disappointed in her. After however many years together you thought you could trust her to be truthful with you. Now you see how she outright lied to you and disrespected all that the two of you ever meant to each other, and you are done with her. You don't want to see her anymore. She can give her lies to other people in her life, but you are not listening to them anymore.
