I have been scouring the Internet for this movie. I'm certain it was B-rated and came out before 2015. I remember only one scene very vividly:
The boy/teen traps a rabbit in the woods and it starts screaming out of fear and the girl finds it to set it free and gets "caught" by him and his "side/tribe".
Later in the movie she escapes (?) but also traps a rabbit to lure the boy to talk him into being good.
I remember it being a very dimly lighted movie since it was in the forest. The boy had black/dark brown hair. The boy and girl were a love interest, I think.
And for some reason I believe at the end of the movie it shows a beautiful tree...
Definitely fantasy!! It was not modern day or historical. The clothes were similar to robin hood style, or a castle setting. No technology whatsoever.
Whatever they were fighting over had some sort of mystical power, like maybe the tree gave off power?