In what way does Holden Caulfield seem confident and independent in "The Catcher in the Rye"?

Holden Caufield, in The Catcher in the Rye, seems very
independent. There are multiple examples from the text which support
this.

First, Holden decides that it would be best for the
letter of expellment to reach home before he returns to his parents'.  He knows that it
will be better for all parties if he returns after.  This interpretation could be argued
given that he could be seen as taking the easy way out, but for me, I have come to
believe that this is leans more towards his ability to be
independent.

Second, Holden decides to go to New York to
kill time before returning home. He is young- 15. For a fifteen year old to travel to
New York and stay for a few days supports his ability to prove his independence and
confidence.

Third, Holden seems to know what he wants. For
a man of such a young age, Holden makes decisions about people and ideas that are far
beyond the typical teenager of his age.

Lastly, Holden
truly worries about Phoebe. His confidence in his decisions to run away are hastened by
his concern for his sister. Again, this shows his confidence in his
decisions.

Again, some may argue that Holden is not
confidant or independent. Some may see him as irresponsible and self-conscious. This
depends on individual interpretations of his character.