when the part came that Draco had Dumbledore and couldve killed him right there and then, he didnt. He kept stalling and Dumbledore did tell him a few times "what are you waiting for"...when the other death eaters arrived they were surprised Dumbledore was still alive ad standing there...they told him get on with it, but Draco just kept threatening Dumbledore, and kept telling him what he was to become aka a death eater...Draco delayed so much that Snape finally decided to do the job for him...
so could it have been Draco felt sorry for Dumbledore? did he feel sorry for what he was doing? I mean Dumbledore had kept him and the entire school safe for 6 years now and was this how Draco was going to repay him? by killing him?
so did he feel sorry for him? I eman i know its a bit to late for him to turn to the good side now, but just knowing he has some good in him feels nice.