The Assassins of Shadow Wood

There's a boy who grows up a werewolf. His parents were murdered by an evil being, the identity unknown, so he lives on to create a group of assassins. Not really full-on "assassins" but people who go on missions to fight off evil. He doesn't normally go as his human form unless it is needed. They recruit a new member, but the main character develops a small crush on her. She is one of the only humans in their group. Will it work out? Will they love to happy ending or will it result in a tragic ending?