I was disappointed in her. I was hoping she would prove to be a valubable and dependable ally and friend to Damon.
I was actually feeling sorry for her in the beginning, when she realized Slater was dead. It is like she keeps losing her friends. So I understand her fear. And she has no reason to have a sense of loyalty to Elena or Damon, so... Still. I was hoping she would make a stand with him. But as Damon said, she has been running for 500 years so it is not surprising. I don't think he was necessarily "disappointed", it feels he kind of expected something like that... I wonder if she'll show up again...
NadinP85, adding you. Welcome!