‘Come and dance,’ he added abruptly to Hermione. She looked taken aback, but pleased too, and got up: they vanished together into the growing throng on the dance floor. ‘Ah, they are together now?’ asked Krum, momentarily distracted. ‘Er – sort of,’ said Harry. (Harry Potter and The Deathly Hallows Books)
Harry could feel Ron shaking.[…] ‘HERMIONE!’ Ron bellowed, and he started to writhe and struggle against the ropes tying them together, so that Harry staggered. ‘HERMIONE! HERMIONE! HERMIONE!’[…] Harry felt the ropes fall away and turned, rubbing his wrists, to see Ron running around the cellar, looking up at the low ceiling, searching for a trapdoor. […] Ron was now trying to Disapparate without a wand. […] Hermione’s screams echoed off the walls upstairs, Ron was half sobbing as he pounded the walls with his fists. (Harry Potter and The Deathly Hallows)
“After you left,” he said in a low voice, grateful for the fact that Ron’s face was hidden, “she cried for a week. Probably longer, only she didn’t want me to see. There were loads of nights when we never even spoke to each other. With you gone…
He could not finish; it was only now that Ron was here again that Harry fully realised how much his absence had cost them.
"She’s like my sister,” he went on. “I love her like a sister and I reckon she feels the same way about me. It’s always been like that. I thought you knew.”