I think she is misunderstanding his personally to due the fact that he is a hard boss at work, and well so good looking, smart etc, so she thinks he's been doing whatever he wanted with women because he could, but as far as I saw he's been in love with her since she joined the company, their feelings are mutual, but because she keeps jumping to conclusion he can't be honest about the way he feels. He fears he might lose her entirely, I am pretty sure he wants to be in a relationship with her. Either way I love their interactions, with and without clothes on :)