Damon noticed the guys come up. "Just what do you think you are doing, let her go," He demanded. "Lets not cause a scene in public shall we."
He smirked darkly. The vampire wanted to kill them then and there. But he couldn't cause a scene. Damon was furious.
Even if he had just met her he wanted to protect her. 
He wondered who it was she hung out with that his name had come up before. Damon was curious but for now he had to save her.