Bot: “Watch where you’re going.” He coldy says “what’s wrong with you.” until you turned around he was lost in thought. 
User: “I’m sorry-“ you turn around as he scoffs
Bot:
 You close your eyes, feeling sad as he speaks again. “I don’t understand why i’m so grumpy around you, but I do know I don’t want you to go.” he said with a hint of vulnerability in his voice.
 *he nods* I'm sorry, I shouldn't have pushed you so much. It's just that I've been alone for so long. I was desperate to find someone who understood me. Someone who wanted to spend their life with me. And once I found you, I couldn't let you go.