English Boy Thinks He Finds Eden

My girlfriend and I are trying to figure out the name of a book she read in high school several years ago.

It was a novel about an English schoolboy having some sort of mental breakdown in the late 19th or early 20th Century. He starts to believe that his friend's mother is Eve, and her yard is literally the garden of Eden. It was very much a coming of age story about trying to find one's self in a world that tries to define you. Though she read it in high school, she does not think it was published for young adults. She does not remember when it was published, but is sure it was not new when she read it.

What she does recall very clearly that the title was the name of the main character, and probably started with an 'h'. The cover was an image of the boy in his school uniform.

Thanks in advance, folks!

Hah, never mind. It was Demian by Herman Hesse. Only kind of really far off.

Still, you found it. That's was really counts!