Whether or not she "gets it" doesn't really matter. What matters is that there is clear closure. Before the relationship there was a 6yr friendship as well. So this was a long meaningful relationship overall. I don't know both sides so all I can advise is that the right path is the one that is consistent with your core values. Forget all the bull, how would you want to be treated at the end of a relationship? How would you feel if someone just cut you out of tgeir life after 6 yrs without any explaination? You may not get the cathartic response you want from her ever. But it seems to me that your desire to just ignore saying your piece is coming from a place of anger, "bitter medicine" so to speak. It might feel good in the moment, but in the long run it does no one any good. My advise say your piece, then block her out. Then you can move forward without any regret.