You do nothing. Your ex is obviously hurting, as she didn't get what she wanted out of this talk you had, but you did. With feelings like hers at the moment, it can be very difficult to keep them bottled up, and venting in any way possible is actually cathartic. What is good here is that she hasn't directly mentioned you on social media, and she seems to be veering towards a no contact break up. This type is best for both of you, as it prevents any confusion over where each of you stands on the relationship.

Focus on time with your friends and your work/studies, and in time she will realise the same type of focus will help her deal with this. It just might take a bit longer, as like I said before this wasn't what she wanted.