I get Yeo Nan's fear. The story shows both of the characters side of story, but every one of them only gets to view it from their own perspective. You guys have to understand Yeo Nan's fear since he never truly experienced taking anything for free without any consequences because of his family's situation or how he was raised. He understands that he might probably be the one who's wrong between the two of them and he's taking his time to distance himself to Dal Guk because 1. He's afraid and 2. He's thinking over and over whether he's finally willing to acknowledge and commit with Dal Guk.
Trust me... it's all worth the frustration, guys.