I choose to answer Ashleys question that is “Why is it that Estella referred to herself as having no heart?”. In my opinion, i think that Estella told Pip she has no heart because of her lack of sentimentality. Estella was raised by Ms. Havisham and due to the way she raised and brought up Estella is why she is emotionally damaged. Estella feels not loved and lonely. However though, Estella actually does have feelings. But she just keeps her feelings (heart) locked and hidden because she doesn't want to get hurt. Eventually she does open up her heart (feelings) in the book. 

By: Akshave Arulparan