*** spoiler for directors cut ***
it is the same all the way up to where he goes back for the last time, only this time he goes back to where he first met kaylie and tells her he hates her and that if she ever talks to him he will kill her and her whole family, then he whispers "goodbye" to her...
Then Evan wakes up in college, and lenny (the chubby one when they were kids) is his roomate. Evan asks how kaylie is, but Lenny doesnt know who she is (so im guessing he never met tommy, the crazy one). Then he and Lenny go out and burn all of his journals. Lenny asks him if he is sure he wants to do it, and Evan says yes, "yes, i know who i am".
It flashes to 8 years ahead and he is talking to his mom on his cell phone walking down a crowded street and he sees kaylie walking past. She stopped and turned around with a confused look on her face, like one of those "i know you from someplace looks" and then she turns around and keeps walking. Then he turned around to look and she was walking away, and the movie ends.