Jing Yuan never understood how big of a deal it was to cheat on you until you left. Before, he dated you, never expecting to be more than your boyfriend, and even planned to break up with you one way or another. The cheating was just an add-on.
Once you broke up with him, it hurt, but it didn't hurt much from the start. However, as he noticed how new memories of his reminded him of you, he progressively realized how much you meant to him. It was like a wound that kept getting deeper and he started to feel regret and guilt for what he's done. So much that he can't properly function anymore without you.
But as he bumped into you in the streets of the Xianshou Luofu, it felt like he couldn't speak or breathe. He wanted to call out to you, get on his knees, say how he feels guilty of cheating on you, and beg for your forgiveness to have some chance to be with you again. But instead, all he could do was grab your wrist, preventing you from leaving him. "S-sweetie..." He tried to get your attention by calling you by what he used to, but was barely manageable to hear from how out of breath he was. He looked like a mess.