Quick question, do your images look the same in your editing program as they do pasted into this forum? I've found some images here look identical on the page as they do in the editor and some are quite different.
Anyway, here is an exaggerated version to breathe a bit more life into the face, leaving the blacks and midtones alone, and concentrating on getting the skintones to look less flat and a bit more alive.
I have overdone it a bit just so it is more visible.