A/N: I've had zero motivation to write recently... started this a while back, finally got around to finishing today so thought I'd post it... Let me know what you think x

Disclaimer: I own nothing

Set somewhere in the middle of season five; AU of sorts

And she says oh
I can't take no more
Her tears like diamonds on the floor
And her diamonds bring me down
Cause I can't help her now
She's down in it
She tried her best but now she can't win it
Hard to see them on the ground
Her diamonds falling down

She gets like this sometimes, not often, but when it happens he never sees it coming.

This time he wakes at three in the morning and finds himself rolling over into a mass of cold sheets instead of the warmth of her body. He panics at first, his sleep muddled brain still wary of her leaving him in the night, but the panic subsides just as quickly as it arose when he sees the light shining from his office. And then it clicks.

He gets up slowly, edging closer to the side of his bed with each move, before standing and walking towards the door. It's almost closed, so he pushes it quietly in an attempt to keep his presence unknown. She's faced away from him, legs curled under her is his chair by the window. She's staring out into the night but he knows that's not all it is; the only time she ever comes out here at this time of the night is when she's lost herself.

This has happened before, less than a handful of times in their few months together, and he's starting to realize what she needs.

"Hey," it's comes out quieter than he originally intended, but in an afterthought he realizes that's for the best. She doesn't turn to him, or show any acknowledgement that she heard what he said, but she did, he knows that. "Everything okay?"

She turns to look over her shoulder, giving him a watery smile, and he sees the tears trailing down cheeks.

Oh, Kate.

"What's wrong?" He's kneeling in front of her now – and not entirely sure how he got to the opposite side of the room – her hands held loosely in his, his eyes focused solely on hers.

She doesn't reply, not with words.

Instead she's pulling herself into his lap, wrapping herself around him, and sobbing into his neck.

"Shh, Kate," He's trying to be soothing, but he's not sure it's helping. "It's okay."

"Castle, no it isn't." She mumbles into his neck.

He's not sure what's wrong, not this time, but he knows better than to argue with her.

"Okay, so maybe it isn't." She pulls back from him a bit, enough so that she can look into his eyes as he talks, see her pain reflected on his face, and he takes that opportunity to wipe away her tears. "But it will be. Not right now, but soon."

"How do you know?"

He doesn't know – not for sure – but it's her, it's them, and whatever the problem is they'll make it through it the same way they always do – together.

"I know because it's us, Kate," She gives him a watery smile, but he can tell that she still doesn't quite believe him, doesn't quite believe that she'll get through this. "Whatever it is that you're going through, we'll make it through together, like we always do."

She doesn't say anything after that, not for a while, at least. She just lets him hold her, lets him help her in the only way he currently can. He whispers words of comfort into her hair as he rocks her, hopes that it's helping her in some way or another, but he isn't sure, he's never sure when she gets like this.

But that's something for them to discuss in the light of day, not in the darkness of the night when the only light she can find is him. So he spends the night holding her, keeping her together as much as he possibly can, and piecing her back together when she falls apart.

A/N: Also, loved the finale last night, but no idea how I'm going to survive the hiatus wow (SO happy Stana signed on though!)