Empty spaces fill me up with holes
Distant faces with no place left to go

Hermione could barely breathe she was in so much pain. Ron had just vanished in front of her eyes! He just... disappeared! After promising Harry and her that he would be there for them. That he was their friend. They were stupid enough to believe him. And she was stupid enough to love him.

Without you within me I can't find no rest
Where I'm going is anybody's guess

Hermione stuck by her brother in their search for the horcruxes. He was crushed by Ron's departure as well. Ron was like his twin, though the two had a brief age difference. But they shared everything. He loved Ron. But he could not imagine the pain Hermione was in.

I tried to go on like I never knew you
I'm awake but my world is half asleep
I pray for this heart to be unbroken

No matter how hard she tried, the pain refused to go away. It felt like a sharp stab in her chest that simply refused to leave. When she was distracted, the pain died down, and was barely noticeable. But when she was alone, he haunted her thoughts. Their memories, his smile, her secret desires, her dreams, everything reminded her of him.

She was incomplete.

But without you all I'm going to be is incomplete

Voices tell me I should carry on
But I am swimming in an ocean all alone

Hermione felt tragically alone in her pain. She couldn't approach Harry; he was dealing with his own heartache from letting Ginny go for her safety and losing all those around him, not to mention the pressure of the prophecy. Ginny was usually the person she confided in, seeing as how she was the prat's brother, and, for her firey personality, was surprisingly good at reassuring and comforting the young witch.

No. Hermione was alone in this.

At least when he was with Lavender she had Harry, who cared about her and Ginny,. She would never admit it, but she spent many nights curled in Ginny's arms and pouring tears.

Baby, my baby
It's written on your face
You still wonder if we made a big mistake

Sometimes, she'd wonder if the pain would ever go away. It didn't ever seem to. It had been months, and yet, she still had a small twang of hope that he would come back, apologize all over the place, and snog her senseless.

I'd try to go on like I never knew you
I'm awake but my world is half asleep

The daydreams never went away. Sometimes, she would daydream of Krum. She hadn't loved him, but, psychologically speaking, when one faces something new and challenging, one seeks the familiar. She had to remind herself then, as well, that he probably had some girlfriend and already forgot her name. Not like he knew it to begin with. Though she still felt a slight pang. In her dreams, she would cry in his arms, and he would sweep her off, making her forget her pain. But it was stupid when she came crashing back to reality. He was in a different country for goodness sakes!

I pray for this heart to be unbroken
But without you all I'm going to be is incomplete

The heartbreak really never ended. It simply wasn't going to go away. Ron never liked her, anyway. She was sure of it! He was probably snogging Lavender for all she knew, not giving her a second though.

I don't mean to drag it on, but I can't seem to let you go
I don't wanna make you face this world alone
I wanna let you go (alone)

I'd try to go on like I never knew you
I'm awake but my world is half asleep
I pray for this heart to be unbroken

When was her heart going to be unbroken?

But without you all I'm going to be is incomplete

Incomplete