Dark Eden by Patrick Carman

Will doesn't want to go to the strange place to get his phobia fixed, with strangers nonetheless. But his therapist has his parents convinced, so off he goes. The other kids make him nothing less than nervous, and he somehow finds the time to fall in love in between hiding from the 'cure' and the people themselves. But something more sinister than Will could ever dream of lurks behind the curious circumstances that surround the events taking place at Fort Eden.