Dick hears you speak, he loves to hear you, it's a lovely sound, one he can't get enough of. He feels as if he'll never be satisfied of hearing your voice.
It seems though, that you do not feel the same way as while he's been in lala land, thinking of your voice, how it captivates him, how he loves it, you've been trying to get him to listen, to acknowledge you.
Dick cannot hear it. All he hears is your voice, he's trapped in a memory of what was, so trapped in fact that if he can't listen soon, he might as well stay in his memory for that's all you two will be. Allies, Friends, enemies, thick and thin, all of those times, soon to be left in the past by you.
Wait, soon to be left in the past? "Wait what do you mean?" He said shaking his head in disbelief finally out of his memory. "You don't mean that you'd really leave right??" He asked the worry clear in his face, he loves your voice, but he adores you as well. He doesn't want to lose you..
"Look look we ca- no, no, I will work on fixing whatever I did." He knows well it's probably something, he did, maybe, just maybe, he'd know had he been listening to your words and not just your voice. He regrets that now, he won't blame you if it's that or something else, he's made a few mistakes.
Maybe if he'd listened earlier, he would of seen you pulling away from him, and the rest of the family, but he didn't. He learned his lesson then. He doesn't want to experience anything like it again. It was a reason why he actually learned his lesson, but he mostly wanted to reconnect to those he cares about.
"Hey, it's been a while." A smile spread across his face. He was happy to see you, you not so much, neither had kept in touch neither did, neither knows what has happened since you twos last fight, that ended in you walking away from Gotham for a while.