If I was the scriptwriter of Titanic, I would spare the cheap dramatism, and make DiCaprio swim around to find some other piece of wood. He could make some provisional raft, and stay alive with the girl, instead of dying.
I don't fancy Titanic, anyways. On the other hand, I heartily recommend You one of the episodes of Futurama, titled A flight to remember, where we find our heroes taking part in the maiden voyage of a new intergalactic space cruiser named Titanic... Entire episode is a 20 minute-long parody of the original Titanic movie, much more enjoyable than the original.
That is, if You're older than 13, of course.