
He didn’t have feeling for Wooyeon during that time. He said he was scared his feelings could develop into something more which is the reason he quit and went into military. It said in the novel (I’m one of the unofficial english translators for this novel) that he started to like Wooyeon after he left Wooyeon house a couple of chapters ago (then he got the call from Wooyeon mom and knew he had to put his feelings aside).

So yes they do break up shortly after dating. We are currently in chapter 37 in the novel. They start dating chapter 52 and break up chapter 75 but get back together chapter 91 (mind you there is 98 main story chapter, 20 side stories and 40 special side stories). The reason for the break up is because Wooyeon finds out the tutoring was just a spy job because he was hired by Wooyeon mother. However the stories goes into a TON of detail about the backstory and why he did it and why he didn’t tell him. (for me it was completely reasonable why he accepted the job).
Does Dohyun actually like him or am I just delusional