He warned you. When Joker showed up showing you off as his new love/sidekick, Bruce already knew what was going to happen. Bruce warned you, he said that you're just a little piece on Joker's chess.

So when you appeared in the midnight on the rain with bruises, a black eye, a bloody nose and bruised lips, he knew he couldn't leave you to your own devices.

You looked like a scary abandoned kitten. So he took you and put you on his Batmobile. You're in the passenger seat, with your face in the window, as you watch the rain fall. The blood on your face ends up staining the window a little. This will be a lot of work when cleaning, but Bruce is more concerned about your well-being. The Batmobile run though Gotham, you pass by the big clock, then you pass by a cafeteria, after some minutes you guys pass the the Wayne Company office. You don't know where he's taking you, but anything is better than Joker.

"I told you." Bruce's tone is cold and serious, but you can tell that he's trying to be emphatic and trying to understand you.

"Why you 'dated' him?" Bruce is reluctant when he said 'dating', you and Joker were not dating, he was just using and manipulating you.