Falling for You by Brenda Novak

Rebecca Wells desperately wants to overcome her reputation. She’s finally trying to put an end to her twenty-four-year rivalry with the perfect Josh Hill, a rivalry that began when she was a kid and the Hills moved in across the street. Great-looking, popular, a successful horse rancher, Josh is Dundee’s golden boy—and the son her father always wanted.

But even when her father insists they call a truce, it’s hard for Rebecca to drop her resentment of Josh. She refuses to acknowledge that she feels more for him than she’s ever let on. The man she loves to hate is also the man she’d hate to love!

Originally published in 2003 under the title A Husband of Her Own