Ryu seemed unmoved as he spoke these words.
If he had to be honest with himself, he might have been far too devastated to be so uncaring previously. Though he hadn't known Sarriel for long, he had already admitted to himself multiple times that she had already had a great impact on his life. Whether or not those things were real hardly mattered, they were still his perspective on things.
However, the Ryu of then wasn't the same now. And, after finding Yaana, his heart was in a state of absolute peace. Sarriel's betrayal didn't make him feel much of anything at this moment. At most, he only felt that it was unfortunate.
Of course, even if he wasn't in such a peaceful state right now, he still wouldn't show Sarriel much of a reaction to begin with. He was very much used to burying what he truly felt inside and maybe it was due to this that Sarriel wouldn't be able to tell much of a difference either way. But, what she thought now was irrelevant to him.