Aaron knows well how stubborn Aarvi is, unless her heart could be moved, it is impossible to change her view so he started to doubt if he ever will get the confession out of her lips.
He was already above the clouds after certainly knowing his dumb Cupcake is in love with him and she also knows about her own feelings. But there is still a part of him that is eager to listen to her words.
He indeed felt weird how he was craving for her to put in words when it is so obvious but he still wanted to see and hear her say she loves him.
Nine years back she was too little so he literally had no expectation other than seeing her happy without hiding her real emotions. Now, he feels his expectation is more like he has a crush on her.
Feeling wronged with the punishment, he followed her out of the elevator, protesting her punishment method, "Aarvi Evans, that's really not fair."