Severus clenched his fists tightly as Draco struggled to tell his story. Severus felt anger towards Lucius like never before. As for Bellatrix, if she wasn't already in Azkaban he would have found many more, even worse punishments for her.
"Draco." Severus whispered cautiously, moving to stand behind the boys quivering frame.
"Shhh." He whispered, placing a tentative hand on Draco's back. He slowly rubbed his back in an attempt of comfort.
What the?
Severus could feel raised wounds on the boy's back. He lifted his hand slowly of the boys back and stared at his bloody palm. Severus closed his eyes and took a deep breath to dampen down his rage and took a deep breath. He squeezed Draco's shoulder to try and reassure him.
"I can't do this!" He heard Draco scream as his voice cracked with emotion.
Severus opened his eyes just in time to see Draco run from the room.
Severus went to follow the boy but stopped himself. Draco needed time to calm down and attempt to collect his thoughts; after all, his biggest secrets had all been revealed in under half an hour.
Severus once again felt the anger inside him boil to the surface. His hands began to shake as he became overrun with emotion. He spun round and punched the black stone wall with all his might.
Crack
The sound alerted Severus to a large, fist shaped hole in the wall. In turn, this lead him to realise how much pain was now coursing from his clenched fist up his arm and to the blood dripping down his knuckles. With a grunt of pain Severus brought his hand up to his chest and cradled it there whilst retrieving his wand from his robes. He tapped his hand with a wince and muttered a spell. His hand burned then all sensations of pain left, all the cuts closed and the blood faded into nothingness. He then calmly turned to the wall and fixed it too.
These spells were ones which Severus had become increasingly expert at over the years. Thinking back there were many things that Severus had learned through his past of depression and self destructive behaviour. For example, he had learned that keeping himself isolated was the only way to not get hurt by others, lying was easier and less painful than telling the truth and that no one could be trusted.
This of course all changed when Dumbledor had discovered his incredibly well kept secret in Severus' final year at Hogwarts. The old man managed to crack the foundations of Severus' well built wall and send it crashing down. From then on Severus had found it surprisingly helpful to have someone to talk too. His self harm became less and less frequent until he managed to quit all together. There were only three people Severus had trusted with his story: Albus, an old friend or his and now Draco. It was at this point Severus realised he was going to have to carefully bring down Draco's own defensive wall whilst in turn reveal more of his life to Draco, the way Albus had done so many years ago to him.