I have been searching for this book for a few years now, since I read it back in 7th grade. It seemed to be young adult fiction from somewhere around the 1970s-2000s. I'm not 100% sure about that time frame, though. I found it in my teacher's library in her classroom, and I have even tried emailing this teacher to see if she could find it but that was a dead end, sadly.
What I remember from the plot of the book, that I think may be true, is that it was about a woman who had moved back to the town she had lived in as a baby after something happened to the aunt that had been taking care of her since her parents death. The aunt she moves in with this time is a well respected or wealthy woman who owns or ran a farm, introducing the main character to a farmhand, friend, or assistant she had. I can't quite remember what exactly he was, but he had affiliations with the aunt in some way.
The town she has moved back to is much smaller than the city she grew up in, and it's in a very rural country area, with her aunts house being farther out into the country side. One day, I think while the main character is out on a horse ride, she comes across a smaller, old, abandoned house. Something about this house draws her in, and she enters it to investigate.
After multiple visits to this house that seems familiar to her, she starts researching what happened to her parents and what happened at that house. Over the course of this book, she also falls in love with the farmhand her aunt had introduced her to and goes to a rodeo with him.
After this point, I don't remember much detail, but I do remember her discovering that the house is where her parents had been murdered when she was very young. Someone she had grown close to in the town, possibly the farmhand or someone else she knew, is the one that killed her parents or lead to their deaths. After she finds out what happens, and the one who caused their deaths finds out she knows, he or she kidnaps the main character to keep her quite.
I don't remember much at all after the kidnapping section. I do vaguely remember the cover of the book, though. It was a hardcover, and the cover art was very colorful, painted or drawn, and had a small abandoned looking old style house sitting out in a field possibly with a blonde woman looking at the house in shock.
I'm starting to feel like I hallucinated this book or something, since I've tried looking everywhere I can by now, so I'm hoping I can finally get an answer here.