I like Taylor Swift's songs. :) This song is called I'd lie.
Song lyrics are below.

I don't think that passenger seat
Has ever looked this good to me
He tells me about his night
And I count the colors in his eyes
He'll never fall in love
He swears, as he runs his fingers through his hair
I'm laughing 'cause I hope he's wrong
And I don't think it ever crossed his mind
He tells a joke, I fake a smile
That I know all his favorite songs
And I could tell you
His favorite color's green
He loves to argue
Born on the seventeenth
His sister's beautiful
He has his father's eyes
And if you ask me if I love him
I'd lie
He looks around the room
Innocently overlooks the truth
Shouldn't a light go on
Doesn't he know that I've had him memorized for so long
And he sees everything black and white
Never let nobody see him cry
I don't let nobody see me wishin' he was mine

Well, there's some more, but oh well.

Let Kleeia Rioleans, one of my characters, change it a little. By the way, she's lovesick.

His favorite color's green
She had seen his wardrobe. It was mostly black, except for a few dark green robes that she had never seen him wearing before. When she asked him, he told her that his favourite colour is green. Yes, the colour of his house, he said. She smiled.

He'll never fall in love
He swears
I'm laughing 'cause I hope he's wrong
"I wonder if you have any crushes before?"
He shook his head.
"Why not?"
He ignored her. She sighed and hoped that she would be the only one that would break through his barriers.

He loves to argue
"I'm telling you now, I have never heard of this... this... ingredient!"
"Oh, is that so? Then, may I ask, have of heard of the Erumpet? No? Its horns are used in the Clarity Potion, I assure you. There, you never heard of it doesn't mean anything." He huffed and turned away.
*Disclaimer, I do not know if the Erumpet thing is true or not."*

Born on nine January
"Happy birthday!" She shouted.
He jumped. "Why, thank you." Then, he gave her a rare smile.
"Well, you should be happy that I remembered your birthday, you know my memory."
He raised an eyebrow. What he didn't know was that that special day was the only day she marked on her calendar.

His mother's beautiful
"Is she your mother?"
He gave a stiff nod.
"Wow, she's beautiful."
He relaxed a little. "I know."

He has his father's eyes
She loved his eyes. Those obsidian black tunnels. Really beautiful. He told her that he had his father's eyes and seemed disgusted about it, but she argued that they were the most beautiful things she had ever seen.

And if you ask me if I love him
I'd lie
"Are you sure?"
"Of course I don't love him. Where did you get that idea from?" She blushed a little.
"Right, it's so obvious that you two have something on now..."
She just ran away, blushing more furiously.

Doesn't he know that I've had him memorized for so long
She stared at the sketches she had drawn over the years. The times where he just bent over the potions, concentrated, when both of them are having fun together, how he walked, his expressions, everything was about him. She could just replay the images in her head anytime she wanted. His every move and twitch of muscle, she just knew it so well.

Never let nobody see him cry
"..... Your... your mother's dead."
He didn't move a muscle, but she could just see his insides collapsing.
"I... I see."
He walked away, but his robes lacked the usual bellowing.
When she was outside his rooms, she could not hear his silent sobs but she walked away, wanting him to cry his sorrows out. She knew he would put a Silencing Charm on the door.