[Part of him is telling him those words aren't right at all. Another part of him is just really relieved that Rena didn't decide to abandon him after he told her, and that she actually seems to understand him. Even if he knows he did a mistake, and even if Rena is also saying it was wrong, the fact that she at least understand his helplessness means a lot to him. And he starts crying now]
I know. I know it was a mistake, and if I had talked with him, things would have gone differently. But even then I... couldn't believe in that path. And I ended up losing.