How have Higgins and Pickering’s feeling toward Eliza changed since she first arrived asking for lessons?

Higgins has feelings for Liza but his creation of Liza is what separates her from him. For many, this temperament is a difficult one. His housekeeper, Mrs. Pearce, observes of Higgins that "when you get what you called interested in people's accents, you never think of what may happen to them or you." Certainly, Higgins gives no thought to Liza's future after his experiment, and when he gradually loses interest in it, he seems, at least from her perspective, to have disposed of her as well. He is shaken by the independence Liza demonstrates and thus by the end of the play is able to show a kind of respect to her. It is on such terms and presented in such a way, however, that a romantic ending between himself and Liza is never really feasible.