Day 21: He or she sees their crush in a library. describe the incident.

WARNING: If you are easily offended, please do not read this.
He spotted her sitting there, he spotted her brushing a strand of hair away and tucking it behind her ear. He spotted her from behind a book about the historical events that took place in South America, something a young boy had left behind on the table. She was staring at her book, her eyebrows furrowed in frustration as she seemingly tried to figure out a puzzle of nonsense on the paper in front of her. He spotted her from 5 tables away, and 3 to the right. She was sitting alone and he spotted her body turn to the right as she greeted a friend and he became enraged with jealousy as he saw that the filthy white converses that approached her belonged to a male. A few words were exchanged, from what he could make out, something about “really good” and “i’ll see you at school” and soon after she was once again alone, perfectly alone. Still watching her, his small dark eyes squinting to get as much of only her in his line of vision as he could.
She was beautiful. Her face was plain and the makeup could make one mistake her for any other whore and by whore he meant girl, but she was beautiful. She was beautiful but she never looked up from the ground, and she never looked up from her book, and she never looked up to see him. She was always looking down, and he memorised how the parting of her hair would be in an awkward zig zag that made him want to slice right down the middle of her head to make it straight again, just like any other girl, make her just like any other girl so she didn’t have to be so god damn beautiful.
It seemed to him that 187 minutes and 58 seconds later she grew tired of studying from her book about the Napoleonic Wars and she slowly packed her things into her bag, leaving the library. He put down his book and followed her out.
The July sun was high in the sky at midday and he was sure to keep no more than 15 feet behind her at all times, edging closer as he knew they were approaching the short dark alley she took every Thursday when she had to walk home between 10am and 4pm. The sun was burning the back of his neck, and he watched as he could almost make out where a drop of sweat had soaked through her top on her lower back, no bigger than a third of his pinky.
And then she tripped.
Being the clumsy, beautiful clumsy fucking girl that she is, she tripped. How perfect. He ran ahead to help her up and she flinched, shocked that somebody was touching her without her permission.
“Oh,” she smiled weakly, “thanks. I’m fine.” She rubbed her ankle before smiling once more and walking off. He hurried after her.
“Hey, wait”
She looked back, her pupils dilated a little and she angled her head by about 5 degrees out of confusion that somebody wanted her company.
“I’m walking the same way. How are you doing?”
Her eyes darted around, avoiding his as they began to walk together in awkward silence.
“Hey you do Spanish, right? I think one of my friends is in your class, Lukas, you know him?”
She looked a little more at ease knowing that this wasn’t just a strange boy with whom she had no connection whatsoever.
“Yeah,” she said. “yeah he’s in my class, how do you know?”
“You have Spanish 4th and 5th lesson on a Wednesday and first on a Friday.”
He was too busy looking at a crow sitting on the wall of the alley they were entering to notice that her eyes had widened, the state of ease she had been in 30 seconds ago disappearing as they entered  the alley.
“Hey. I didn’t mean to sound like a stalker, I just know that because Lukas has the same lessons as you…honestly. I think you’re beautiful and I want to get to know you.” He looked down at his shoes while speaking every one of those words, withering in shyness awaiting her response. She stared at him and then back down at her shoes, her grey ballet pumps, and he made the mistake of looking over at her looking down and noticing her wonky hairline and the way her dark locks were catching the sunlight, giving her golden brown highlights.
“That’s very kind of you,” she started, “thank you. But I can’t, I have to go.”
“But you’re so beautiful,” he stopped and frowned, turning towards her. “I want to get to know you.”
“I can’t,” she said, backing away with each step he took towards her.
“You’re so beautiful,” he brushed her hair away from her face, just like she had done in the library. “You’re so damn beautiful,” his hands clamped around her throat as he pushed her against the wall.
“Please,” her arms were frantically pushing against him, against the wall, anything to get him off her.
“But you’re so, so beautiful,” her hair was tangled in the fist he made out of his right hand as he pulled it back to reveal more of her face and leaned in to smell the musky perfume of flowers and vanilla radiating off her as beads of sweat escaped the skin on her forehead. She was struggling against him, stupidly thinking she could just wriggle her way out of his grip because he had little to no muscle mass on him at all, a weedy boy from the offset with sallow skin that made him look unwell, but it was his dark handsome features that just about saved him. He was shaking as he now held two fists of her hair, bringing his head down to her neck, taking a deep breath, scraping his teeth against her gently as she whimpered.
His teeth penetrated her skin and she screamed. His jaw was locked in her flesh as she wailed, kicking and punching at him to get him off her but his hold on her beautiful brown hair was strong and he kicked her in the knee to stop her trying to move. The irony tasting liquid filled his mouth, and rather than unhooking his teeth from her flesh, he clamped his teeth shut inside her neck and ripped it out. Her shriek almost deafened him as she fell, her head being held upright by his grip on her hair. It was matted, it was dull and her parting was straighter than his blurred vision let him believe. He let her drop and pulled out a pocket knife, ramming the blade into her scalp where her hairline met her forehead, dragging it all the way to the back in a perfect straight line and he dropped the knife and she was screaming and her head was down, and she didn’t look up from the ground, and she didn’t look up to see him run away.