Responses
The Director does NOT think it is shameful to like Ahn, he feels pathetic because he is not acting like a professional adult.
He wants Ahn but he already said that crap about only a one night stand; he also needs to respond to that love confession and he can't screw up their business relationship, esp with Ahn as the face of the company's new young image yet he is getting more jealous with all the attention Ahn is getting. His business persona is at war with his heart, he isn't a tsundere.

no, man! The director needs to realize that liking Mr. Ahn is not shameful or pathetic! It will only hurt you both...
also, secretary cha is my spirit animal
spoiler:
because the director has trouble saying how he truly feels, it gets like ten times worse!