Adding onto @UltimaCroix, you should ask yourself what you want from boarding school. Even if your lps is good, there are still major differences. Even if you went to a school like Trinity, most BS will offer much more for you.
Then, if you realize that boarding school is the better option, I highly urge you to cast a much wider net. 9 out of 10 students get rejected from those schools, and many of those applicants have higher grades than you.