Lani Garver, Human or Angel? What's his fate?

Claire goes to a doctor that stitches up her head because of the injury. She listens what he has to say, and he talks about angels. He says that angels come to Earth to help people and show them the good in themselves and others. Claire didn't really believe him at first, but then she kept listening. Also the people around here all believe that is true. He also says that angles may appear to look like homosexuals because they don't have a gender. When he says this I think and I am pretty sure that Claire also thinks that Lani Garver could be an angel.
Lani says that he is not a girl. He never says that he is a boy though. This can mean that he is hiding something that he cannot reveal, such as him being an angel. Claire also can't ask him that, because if Lani is a normal person, she would sound crazy.
Questioning what Lani really is makes you think about a lot of things. Do you (or the characters in the book) believe in angels? Are they real and can they come to Earth?
Near the end of the book, the friends that Claire used to hang out with are planning to drown Lani as a prank or to be cruel. They end up also doing it to Claire because she hit one of the boys with a hammer. They were in a fishing net being tortured then the boys stopped and cut the net. However, Lani was not helped by them and only Claire tried to save him. What exactly happened to Lani Garver, the book ends and does not tell. The Author leaves it to the reader to decide what his fate was.