How does JP's opinion of Bobbi change over time in the novel, A Face in Every Window?

After Bobbi moves into the farmhouse, JP recognize her merits. She works at the animal shelter and brings a dog home. Over time, JP develops feelings of love for Bobbi and believes that she reciprocates. He is devastated when she rejects him in favor of an abusive boyfriend, Don, who causes Pap to fall from the roof.