One Direction preference

How the boys know he secretly loves you.

Harry: "Harry, what are you doing?" Liam asked, his brow furrowed. "Just watching a film." Harry answered, studying the movie you'd been raving about. "Be quiet, this is her favorite part." The movie came to a close. "You never watch black and white movies." Liam laughed, the rest of the boys filing into the room, all knowing what he was watching, and the exact reason he was watching it. "It's because he likes (Y/N)." Zayn laughed, teasing a little. Harry blushed a little, his cheeks turning a pink. "More like he loves her." Louis exaggerated his sentence, all of them knowing of Harry's true feelings for you.
Louis: No matter what he was talking about, he could somehow associate it with you. The boys took notice of every time he brought you up in a conversation. "Yeah, (Y/N) said this place has really good food. (Y/N) gave me the idea for this tattoo. One time me and (Y/N)...." They would only glance back and forth at one another as you were brought up in a conversation once again, knowing that Louis' feelings for you were greater than what he'd said, knowing it was love.
Niall: Anyone could see it but his four best friends were more observant than anyone. They would notice the way his face lit up when your name popped up on his phone, the extra effort he put into looking good when he knew there was a chance he could run into you, and especially when he would be in interviews. All five of them would squish together on a couch, the interviewer asking one of their usual questions. "So, we've got three out of five taken right? Niall and Harry are still available?" They would all nod, Niall's face turning a deep shade of red as he thought about the girl he hoped he could put his hand up for one day as being taken. And the boys knew, Niall loved you.
Liam: It was the simplest of things that made them all realize that Liam was in love with you. Liam had been in a few relationships over the years but when he met you, something was different. Never had the boys seen him look at a girl the way he did you. His eyes would light up with just the mention of your name and they truly knew he was head over heels in love when he couldn't stay away, when they realized Liam would do anything to have you in his life, regardless of time or distance. Liam was unable to be without you, a testament to his true love and adoration.
Zayn: Zayn was always doodling on scrap pieces of paper, old napkins, anything he could get his hands on. As the boys all sat, waiting for their interview to start they notice him drawing out a comic hero, a large heart printed on her chest, a girl who was no doubt supposed to be you. "Is that (Y/N)?" Louis asked, smirking at his drawing. Zayn immediately shook his head, crumpling it into a ball and tossing it in the trash next to him. "No, it was just a picture that popped into my mind." He shrugged it off but Louis saw him when he looked away, Zayn's hand reaching into the bin, stuffing the balled paper into his pocket until later, when he could continue his secret thoughts and fantasies of the girl he loved without the boys' eyes watching him.