I'm not really sure I want to figure out Rou!Watanuki's feelings. They seem made of stupid and opium. But in many fandoms of mine (Fullmetal Alchemist, Tales of the Abyss), boys do really idiotic things for their dead mothers or female mentor figures without loving them romantically so I don't think it's must be that. And I never shipped Watanuki with anyone.

On the other hand, I appreciate that Yuuko tried to get him out of it. Sucks that everyone was so dumb and the plan never worked, though.