"I killed one of your friends... I am sorry." Damon looked down. He expected her to start yelling and hate him. He knew that she had trouble trusting him in the past. But now? maybe she had good reason to not trust him. 
He knew that he wasn't like Stefan he would never be. He was sure that he had completly ruined everything. The vampire sighed and leaned back sipping more of his drink. He saw a look of rage in his brothers eyes.
"You what!!! " Stefan growled. He had told Damon so many times to stop with the killing even if he was angry. He knew sometimes Damon couldn't control himself. But Elena's friends were his friends too.
Damon growled at Stefan "ohh because its so easy for mr perfect who drinks animal blood." he snapped "You have made mistakes before. You cant even control yourself on human blood."