Chiquita on Shutter Island

Last weekend I saw the craziest movie ever. Its called Shutter Island. It starts out with two investigators landing on an island off a ferry. The lead in the movie is played by Leonardo Dicaprio. He is one of the investigators. There are all kinds of crazy twists in the movie. He is there because he's looking for a prisoner/patient that seemingly vanished. Everything seems super shady. Dicaprio's character (who's name I don't recall) has never worked with his new partner before. The story goes that his wife (Dicaprio's wife that is) died in a fire and he keeps having flashbacks and nightmares about it. In the end, it turns out Dicaprio's character is actually a patient at the asylum. He's acting out this crazy hullicination, and all the employees at the asylum/prison are pretty much letting him do whatever he wants according to his fantasy because a few of the doctors are convinced it will bring him back to reality. The fantasy he's acting out involves the patient that disappeared. She killed her three children, drowned them in the lake behind the family home. In reality, Dicaprio killed his wife. Why? Because SHE killed their three children, in the lake behind the family home. The whole reason the employees were allowing him to run about recklessly on the island and come back to reality is because if he doesn't he has to go to the lighthouse to be experimented on. The doctor's thought they could help him without having to experiment on him. Towards the end, it seems to work. They get him to say who he really is, and to admit to what he did. So now he doesn't have to go to the lighthouse, right? WRONG. In the ending scene, his partner who turned out to be one of his doctors, and him are sitting on the steps of the mens ward. Dicaprio whispers to his "partner" that its going to be really tricky getting out of this place, its a lot worse than he thought. The doctor looks across the lawn, and shakes his head at all the other doctors. They all come over and lead him away to the lighthouse.
I'm not really sure what to think about the ending. I'm not sure if he really is crazy and thinks he's still a well to do detective, or if he does realize and remember what he did, and he wants to go to the lighthouse because he can't live with what he did. Pehaps when the movie comes out on DVD, I'll watch it again and blog about my conclusion. That's all for now!
Here's the trailer, but it does the movie no justice.