Eddie frowned as he watched Harley break down, his brow furrowing deeply. This was big news. Ivy meant nothing to him - she was a man-hating, controlling bitch who probably deserved whatever death was dealt her. However, Eddie did like Harley - she always had been there for him, just like how she helped him to escape at the hospital, no questions asked, no strings attached. She was the closest thing he had to a friend in this messed up life of his.
And Harley's sorrow was the only reason he felt bad that Ivy was dead.
A weeping woman was something Eddie didn't know how to deal with, and so he awkwardly watched Harley lament and wail from a safe distance. Finally, he told her, "I'm... sorry, Harley. I know you two were friends."