Something happened to him, after he had a fight with him.
He regretted that the last memories between them remained in this unpleasant quarrel and breakup.
But after he woke up, he lost his memory again. Does that mean this is a new beginning?
He deceived him, so he wanted to break up with him. No matter what he did, he couldn't save him. Then something happened to him. When he woke up and saw him still worried about him, he deceived him again. This time the purpose was to deceive him again...