In Harry Potter and The Halfblood Prince chapter 14 (Felix Felicis) Hermione told Ron after he complained about the Slughorn party because he was not invited that she was going to ask him.

"During The Halfblood Prince chapter 30 (the white tomb) Ron holds Hermione and strokes her hair wile holding her.

In The Deathly Hollows chapter 8 (the wedding) Ron asks Hermione to dance.

In The Order Of The Phoenix chapter 19 (the lion and the serpent) Hermione kisses Ron on the cheek and wishes him good luck.

During The Deathly Hollows chapter 23 (malfoy manor) wile Hermione is being tortured and Ron is screaming her name of the top of his lungs and banging on the walls because the girl he loved was being tortured.