Pride and Prejudice? Elizabeth Bennet needs to chill. She gave Darci way worse than he deserved. Love is just a transaction. We are all hardwired to desire. We present the correct set of desirable traits and boom, we can turn it on and we can turn it off.
It was Darci's very attitude that attracted Elizabeth to him. The only reason he even asked her to marry him was because she wouldn't stop throwing herself at him. She's clearly not satisfied with her life and is looking for excitement whenever she can get it.