angelic, it's not that we disapprove of your desire, of your longing, of YOU... it's just that, at this time of year, that topic of LOAs is all over the place. Remember, most of the competition you'll face in getting a nom or appointment is formidable: 4.5 on a 4.0 scale, top athlete, excellent SAT, started own business, hundreds of volunteer hours... etc. The LOA is just so uncommon and so many young kids either think they deserve it or can't imagine that they won't get it.
Here's a case in point: My twins had almost identical scores in everything. GPA down to the thousandths of a point, finished at the nationals w/in 2 places of each other in three fencing categories, work, resumes equal... blah blah blah. One got an LOA, one did not. They both graduated USAFA in 2012 and are now both flying the airframe of their choice. Ironically, the one who did not receive the LOA finished with a very slightly higher GPA at USAFA, AND he's the one with his name on the wall at the Field house since he got a perfect PFT. Go figure.
Now, relax. Work on your plan B.