In the book, he leads the Hobbits off the trail from Weathertop, but then he gets lost. (Which I would too if I were in the woods... don't follow me, I need street signs)
After Boromir's death, the angst isn't about Boromir, it's about Aragorn. Everything I do comes to nothing...
You're right about waiting for Frodo... he couldn't really decide what to do until then. But you don't get that in the movie. In the movie, he was following Frodo to the end. It was only after the confrontation, that he let Frodo go.
The movie Aragorn is more sharply drawn. But, you have to do that in a movie where you are just one of 9 supporting characters. In the books, I have pages to devote to angst and self-doubt. That's what makes his transformation after looking in the palantir so amazing.
In the book, he leads the Hobbits off the trail from Weathertop, but then he gets lost.
Maybe he doesn't come out where he originally wanted on the way from Weathertop. But after one quick scouting trip, he's back on course.
After Boromir's death, the angst isn't about Boromir, it's about Aragorn. Everything I do comes to nothing...
That sounds to me more like what anyone would say when they've had a bad day. :)