People still think Sakura blushed? Really? Look:
It was a dark line. Just a simple dark line of dirt. Each side of Sakura's face has different types of lines. When you draw a blush you need to be symmetrical. Let it go.
Just the fact that Sakura herself said to Naruto to not whine about the little details should already be an indicator that we shouldn't either.
Sakura will probably have a closure moment with Sasuke, but it will be a serious moment. She's not going to fangirl like some people believed she did here. She acted completely normal. She was just happy, not enamored.