Blaine and Kurt have been dating for 5 months and no one knows...

"So, we have a new member." Mr. Schue gestured to the boy sat next to Kurt, "Blaine Anderson."

"Hi." Blaine waved.

"So, this week's assignment is 'Serenade'. You have to pick someone to serenade." Mr. Schue smiled.

"What about Blaine? He doesn't know anyone." Rachel looked back at the raven haired boy.

"Well, Blaine, you don't have to do it if you don't want to." Mr. Schue smiled warmly.

"No, it's okay. I'll serenade someone." Blaine smirked, trying not to make it so obvious that he was looking at Kurt.

"Okay then." Mr. Schue grinned

"Mr. Schue?" Kurt raised his hand, "Can I serenade my person now please?"

"Of course. But don't you need to practice?" Mr. Schue tilted his head.

"No, I've been practicing it for a while because I wanted to sing this song to Blaine for ages." Kurt smirked at Blaine who grinned.

"But you've only known him for a few minutes." Mercedes frowned.

"I knew Blaine from when I went to Dalton."

"Oh." was all that came in reply.

Kurt stood up and walked to the band, standing in the front of the Choir Room once he'd handed them the sheet music.

How long will I love you?
As long as stars are above you
And longer, if I can.

Kurt's eyes met Blaine's.

How long will I need you?
As long as the seasons need to
Follow their plan.

Blaine smiled happily, his eyes never leaving his boyfriend's

How long will I be with you?
As long as the sea is bound to
Wash upon the sand.

Kurt closed his eyes and took a deep breath before opening them again so he could stare back into those amazing hazel globes.

How long will I want you?
As long as you want me to
And longer by far.

Blaine was grinning madly and Mercedes was frowning at the pair who hadn't looked away from each other apart from when they needed to blink.

How long will I hold you?
As long as your father told you,
As long as you can.

Kurt shook his head, trying to hide his blush which appeared for no apparent reason.

How long will I give to you?
As long as I live through you
However long you say.

Blaine tilted his head in awe at his boyfriend's beautiful voice.

How long will I love you?
As long as stars are above you
And longer, if I may.

The band stopped playing as it was scripted as Kurt sang the last few lines.

We're all through time together
Every day of our lives.
All we can do is do our best
To relish this remarkable ride.

The choir room exploded into applause but Kurt only had eyes for the teen sat at the very back, staring at him as if he was the most important thing in the world. Kurt grinned as Blaine ran up to the front and enveloped him in a hug which lifted him off of the floor while his boyfriend spun him around.

"You better not drop me." Kurt said in between giggles as his boyfriend kept spinning him around in circles.

"Never. I got you, baby." Blaine grinned up at his boyfriend.

Kurt chuckled and leant down to kiss the raven haired boy, causing him to still in his spinning and let Kurt slide down his body and onto the floor.

They both sighed happily as they pulled away and stared lovingly into each other's eyes.

"Everyone's staring at us." Blaine whispered once he'd leant into Kurt.

Kurt laughed and grabbed Blaine's hand before pulling him back to their seats.

"So, Blaine's my boyfriend." Kurt giggled at the shocked faces on all of the New Directions.