Don't worry, we got this! I'm the master of sweet talking, persuasion, and anything else in between!

What I'm thinkin is that we use her friend as the messenger because ur girl should listen to the friend, and if the friend likes you enough, she can maybe throw in a few things for you! The thing is that the friend most likely will tell her about your interactions, so there's no need to ask her to relay any information. We need the friend to answer why exactly your girl is mad, and give us a gauge of how mad. Imo, she shouldn't be too mad that you didn't want to answer her deep questions unless they were answered with a direct lie. If that's the case, we'll change tactics. But first I would ask (the friend) why exactly is she mad, like did she not like the fact that you were using your friend, so it made it seem ingenuine, and after she answers I would say (talking to the friend) something about how you didn't know how to answer the questions, and how you weren't doing it to make her mad. It would be really helpful to know what the questions were, and how you responded to them, but I get it if they were really personal.