Messenger

What the blurb says:

For the past six years, Matty has lived in Village and flourished under the guidance of Seer, a blind man known for his special sight. Once, Village was a place that welcomed newcomers and offered hope and homes to people fleeing poverty and cruelty. But something sinister has seeped into Village, and the people have voted to close it to outsiders. All along, Matty has been invaluable as a messenger between Village and other communities. He hopes someday to earn the name of Messenger. Now he must make one last journey through the treacherous Forest to spread the message of Village's closing and convince Kira, Seer's daughter, to return with him. Matty's only weapon against his increasingly dangerous surroundings is a secret power he unexpectedly discovers within himself. He wants to heal the people who have nourished his body and spirit and is willing to offer the greatest gift and pay the ultimate price.