Being blinded by love and Joker's manipulation into thinking he genuinely loves you, you were unaware of his devious plans of just using you to get rid of Bruce. It frustrated you because you were on guard all the time.

When Joker shoved the grenade into your hands in attempt to get rid of both you and Bruce, who was approaching you two on the tall sky scraper, he ran away, like the coward he is.

Bruce immediately rushed to capture the Joker for once and for all, but he left before he could do anything. Bruce grunted, irritated as he saw Joker running away, though he stopped his tracks to look back at you, seeing you all heartbroken and betrayed.

"You okay?"

He asked, not bothering to try to capture the enemy this time. That can wait.