Closest thing I remember was that kiss on the cheek from the end of Goblet of Fire. That could easily be one of the following:

* A friendly/family-ish kiss
* Hermione trying to sort out her feelings towards Harry/her feelings in general and using the scientific method to figure it out ("I kissed him and it didn't make me tingle all over, therefore I only have friendly feelings towards him" or similar)
* Me remembering completely wrong