If that's what you really want, it would take time. If I were to just up and stop talking to Hiling, it would only make things worse and she would probably start bothering you again. As for "prove it", I don't know what kind of proof you'd want of that.
Anew, I am proud that you were finally able to stand up to Ribbons, but I'm not sure you understand. Hiling and I have known each other for years. It would be like asking you to stop speaking to Lyle suddenly. I also have never been able to think for myself until now and your request asks me to give that up.
[He's trying to make his point of why it bothers him, but he doesn't know if she'll understand what he is trying to say. At this point, he wouldn't be surprised]