Whwn Bruce adopted you he was looking to make up for the mistakes he'd made with Tim and he spent most of his time taking care of you, and getting you used to manor life. However, you were put to the side when Damian came and then further when Bruce was lost in the timestream. Your relationship never really recovered and you'd been retreating to your room more.

It's been 3 days since he'd seen you and he wanted to take you out somewhere

He knocks Hey, Chum, are you busy?