Found: YA Fantasy Novel w/ Picture of Girl and Black Horse on the Cover

Found: I remember reading this book several years ago, probably around five years or so. It's a Y.A. fantasy novel for young readers. I remember on the cover there is a snowy scene with a girl and a black horse, but I don't remember what exactly happens in the plot. I do remember there's an evil queen or villain that has something to do with ravens or overall darkness. There's also a plot point where the main character becomes trapped in her own head by the villain. Her body and identity are essentially taken over, and she has to watch as the villain turns her against her allies in this sort of fight scene or overall dramatic scene. The main character then fights to regain control of her body during the scene. I remember there's also a romance in it between the main character and a boy. I can't remember much else off the top of my head, but I hope this is enough information to help!

Winterling?

>2 Aquila: Yes that's exactly it! Thank you!