“The Boys Next Door,” is a poignant comedy centering on four mentally challenged men living together in a neighborhood group home. For them, life is alternately confusing, threatening, and wondrous, but for Jack, their social worker, life has brought him to the brink of deciding whether to continue in his job or go in a new direction. “The Boys Next Door” is a heartwarming play that reminds audiences that we all have hopes and fears, dreams and disappointments, and that we aren’t so very different from one another.