he doesn't want to know what kind of feeling is that! and at the same time, he doesn't want to know why he was feeling something like this to Ava, the woman he hates the most.
Harry and Ava arrived at the party, and when Ava was above to open the door, Harry grabbed her hand making Ava turn back to look at Harry in confusion, he smiled at her making Ava really shocked and confused as he said "I don't want anyone to know that there are problems between us, I want you to act as if we are a great couple! nothing is wrong with us and everything is fine, smile and behave properly!".