I think this movie was made in the 2000s. It’s about a teenage boy and his mother moving into a home out in the country in a small town. He goes to explore the woods near his house and meets a teenage girl with long red hair. He ends up spending a lot of time with her. The neighbor warns him about her and how she is bad. But later in the movie he discovers her body hanging from a large tree and that’s how her ghost self is still around. Things go back and forth with the girl and the neighbor, then the neighbor hangs himself on the tree with the girl so he’s a ghost too and the only way to save the girl from the bad guy is to cut them down. So the teenage boy cuts them down, then hangs himself at the end of the movie and becomes a ghost to walk around the woods as well.