The novel Wuthering Heights presents such as tragic view of love that this is an excellent question. Catherine Linton initially showed repulsion and anger at Hareton Earnshaw. Hareton is very much life Mr. Heathcliff when he was younger. He can not read, until Catherine teaches him. He is uncouth and moody. As time progress and Catherine has been banished away from Mr. Heathcliff's sight to the kitchen, the two become close.
The intimacy thus commenced grew rapidly; though it encountered temporary interruptions. Earnshaw was not to be civilized with a wish, and my young lady was no philosopher, and no paragon of patience; but both their minds tending to the same point - one loving and desiring to esteem, and the other loving and desiring to be esteemed - they contrived in the end to reach it.
Hareton protects Catherine from Heathcliff when he vows to harm her for getting Hareton to side with her. This took great courage on Hareton's behalf. Heathcliff is the only one who protected him from his father, but at the same time kept him in a state much like Heathcliff had been kept by Hareton's father.
As time progressed the Catherine and Hareton changed for the better.
His honest, warm, and intelligent nature shook off rapidly the clouds of ignorance and degradation in which it had been bred; and Catherine's sincere commendations acted as a spur to his industry.
Through the relationship of Catherine's daughter and her cousin Haretonwe are able to see an innocent and beautiful love that gives us an inclination that despite their class differences they will have a good marriage. Hareton is kind and good and mourns his master's passing. He may have been raised by Heathcliff, but he also has kindness in him. Catherine has her mother's spunk and spirit and is also kind. There love represents the love that Heathcliff and Cathy did not get to fulfill.