Tears.
In abundance, they fell from Rey's eyes as he heard those words from Alicia.
His eyes were wide open, encapsulating both shock and relief, leaving a gateway open for the bitter tears to flow.
Rey's knees felt weak, and before he knew it, he fell to his knees.
"I'm sorry for not telling you all this time! All of my reasons sound like excuses to me at the moment, and I know… I know I was supposed to say something, especially after you went and told me so much about you."
Not only did he passively deceive her, but he actively even lied to her.
And the result?
"Everything that happened to you… the tragedy that day… it happened because of me! If I wasn't so obsessed with trying to lead a double life, then everything would have played out completely differently!"
Rey's emotions were reaching the point of System interference, so he had to stop.