Grey Eyed Monster.
Draco caught himself twiddling his thumbs and growled in frustration. He was sitting in the Slytherin common room in an oversized leather black leather chair. His elbows were placed either side of him on the arm rests and his long legs were out in front of him, up on the dark mahogany coffee table, elegantly crossed at the ankles. Classes had finished for the day and Draco had removed his robe the moment he had entered the common room and flopped in to the chair he was currently sitting in. He had long ago removed his Italian leather shoes, placing them delicately on the floor at his side. His black cotton socks encased his feet in warmth as he flexed his toes to ease the day's cramps away. With careful precision he removed his sterling silver cufflinks and placed them in the shirt pocket at his breast. Carefully he rolled his shirt sleeves to just below his elbows, smiling slightly as his bare forearms came in to view. With his left hand he reached up to loosen the knot of his tie and undo his top button. Today had been a hard day.
...
Harry Potter was the cause of all his problems, he was sure about that, those stupid green eyes that twinkled when he laughed and that adorably messy hair that Draco longed to comb his long fingers through, and the day had started do well.
...
Breakfast had been a boring affair to begin with, the same people, eating the same food, holding the same tedious conversations; Draco had given up caring about who was sleeping with who and his eyes glazed over as he swept his gaze around the Great Hall. Draco sighed, chin in hand, at the dull monotony of it all, but then, something happened at the Gryffindor table that stopped his breath as it made to leave his body. Seamus Finnegan had leaned over and softly taken Harry Potter's chin between his thumb and fore finger and pulled him gently in to the sweetest kiss that Draco had ever seen. Draco could hardly believe what he had seen; he blinked slowly and looked again just as Potter's cheeks began to take on a rosy hue. Potter was blushing and Draco saw red, pushing his unfinished bowl away from him he stood and stalked from the hall before he could say something that he regretted.
...
The 8th years had been back at school for two months now and things had changed drastically for Draco. Over the summer he had connected with his Aunt Andromeda who had willingly invited him in to her home and he had stayed with her refusing to return to the Manor he had once called home. His Mother and Father struggled with the decision and once his Father had been hauled off to Azkaban his Mother had retired to the South of France and he had not seen her since. Draco's life now revolved around the small child that was his cousin Teddy and he was fine with that, it worked, well it had until Teddy's Godfather had come to visit and over weeks of stilted conversation and caring for Teddy Draco had fallen in love. Draco felt like he had been hit by the Knight Bus when he realised what the strange feeling building within him was. He had no idea he even liked boys and here he was watching Harry bloody Potter's every move with wide eyes, he knew it was love because he couldn't describe how he felt. Harry's smile was the brightest thing that he had ever seen seemingly lighting up their surroundings at a moment's notice, on more than one occasion Draco had had to stop himself reaching out and touching Harry, nothing sexual, just touching his arm or shoulder, any contact would have done. Draco had found himself doing anything to make Harry smile even if it required making a fool of himself, blowing raspberries on Teddy's stomach or making animal noises for the infants entertainment, anything to see those brilliant green eyes light up, he really cared what Harry thought of him.
Summer had been lovely but Draco knew it was a lost cause, Harry was dating Ginny, or well he had been, but he had talked to Draco about making it work, about building bridges after the war, Draco had sat nodding wisely and listened, all the while crumbling a little inside, he knew Harry liked girls, was making headway with Ginny and that was ok, he had accepted he would never be with Harry for these reasons and was learning to live with that, but now this, this changed everything.
...
Draco realised he needed more information, he had no idea whether what he had seen was real, it had looked real, he stomach churned at the thought, just remembering the way Harry had looked up through those long eyelashes at the Irish twerp made Draco tremble with a barely suppressed rage. He really didn't understand, what did Finnegan have that he didn't? Well he knew there were many reasons that someone would choose the Irish boy over him but he didn't want to open that particular door. But Harry, he thought Harry was different, that he could see Draco for he is now rather than who he almost was. Draco sighed and kicked out at an invisible stone that seemingly lay in his path on the way down to the dungeons.
Draco entered the potions classroom and finding his seat, dropped his bag to the floor kicking it under the desk. He perched on the edge of his stool and glanced around the classroom, immediately wishing he hadn't bothered getting up that morning. This lesson was going to torture him, as he looked up he noticed Dean Thomas walk past his usual spot and take the stool next to Weasley, this could only mean one thing, and as Draco watched his fears were confirmed and Harry walked in to the classroom. Finnegan caught his eye and patted the stool next to him and sent Harry a small smile which Harry returned as he sat carefully next to the Irish boy. Draco felt his heart plummet through the ground as Finnegan hooked his foot around the leg of Harry's stool and pulled it closer so Harry's arm pressed fully along his own. Draco swallowed but could not take his eyes away from what was happening in front of him, he could feel the bile rising at what he was witnessing. Draco's eyes widened as Finnegan leaned in to Harry whispering something in his ear causing the tips of Harry's ears to turn a vivid shade of red, he placed his hand on Harry's lap and gave a little squeeze causing Draco to clench his own hand in to a fist digging his nails deep in to his palm to avoid making a scene. Finnegan still hadn't moved his hand and Draco was taking deep breaths to prevent himself from getting up and forcibly removing the hand from Harry's leg. Draco had to leave, this was too much, he stood up and grabbed his bag just as Slughorn entered the room, the portly man raised a questioning eye-brow at Draco's behaviour but Draco continued his journey muttering something about being ill and the hospital wing.