I agree!I said in a post earlier that I think for the first time RK realized how much he put Madhu through. He probably never sat down and thought about everything together. But when Malik mentioned it all in one go "You destroyed Madhu and she still gave you blood, etc." then RK looked down and started thinking. He didn't want Malik to see his weak side though, so he pushed that away and continued talking to Malik. But once Malik leaves, RK will definitely think about everything he put Madhu through, etc. And he'll realize she really has developed feelings for him, because Malik did mention that "I don't know how a monster like you has made a place in her heart".
Then RK will push her away I believe because he won't want to get attached to her, afraid that he might lose her once he does.