Aaaand here's the crux of AAAAAAAAALL of this, he complains about not being certain about the relationship, she EXPRESSES the same feeling to him, meaning he's doing the same to her, to which he replies "you know" which just like you she clearly stated she DOES NOT, in fact, know.
Like, I know he has some trauma and I know he's scared to admit it but, in this chapter it reached the breaking point of how adults would resolve this.... like, come the fuck on man! I understand not telling her that you like her, but the way you're doing things is just absurd.