Answer: Where I Belong by Mary Downing Hahn
Explanation:
It’s about a boy, Brendan, who has been a foster kid all his life, is a social outcast everywhere. He finds solace in the woods behind his house, where he builds his own castle, and befriends a man he calls The Green Man. He learns to cope, and even makes a new friend during mandatory summer school.
Situational irony. The definition of situational irony is “the contrast between what a reader or character expects and what actually exists or happens.