"Let me out!" Luke's groans just got louder, matching your desperate calls for him to just let you go, to let you leave him.... ― the back of his head met the door with a light thud as he pushed his hands through his already messed up hair.
For the first time in so long, he just didn't know what to do.
Of course, it was wrong to lock you inside one of the rooms of the Andromeda... but Luke's moral compass has been constantly spinning. And perhaps he had hoped that some of your goodness would seep into him, and cleanse him of the bad that's been cursing through him.
Although that was really just wishful thinking...
You weren't a hostage, not to him anyway. You were here because he still loved you, and he wouldn't let Kronos take that away from him. Even if you will hate him.
"I can't. You know I can't," he could hear you shuffling around, possibly seeking for an escape..., "just calm down, okay? Please. Let's talk."