I would have done much the same, Christin Platzek, I think. Sometimes a conversation just fails miserably, and our only hope of salvaging the relationship is to end it before it gets truly ugly.

I hope you and your dear friend are able to either agree to not talk about that topic again (these days, there are more taboo topics among great friends than I think there ever have been), or try one more time to see if there’s any way she can at least see your side, even if she doesn’t support it.