She doesn't necessarily like being nice to her. She is just a child of 10 years old. It is also true that she never loved humbert in the end. Besides, Lolita and Quidditch are not for fun. Quetta is the only man Lolita likes. Even though Quidditch made Lolita make a bad film and Lolita escaped, Lolita only likes Quidditch in her heart.