Biddy shows kindness but does not fall in love.
The character of Biddy is in sharp contrast to Pip's sister. The first who brings up Pip with her husband Joe Gargery, is strict to the point of being brutal.
However Biddy who is Joe's second wife after Pip's sister dies, shows Pip kindness and support especially when he is suffering from Magwitch's death and the fire in Miss Havisham's house.
The love in Pip's life is Estella.