A few thoughts:
Prep school? No offer was made so the possibility exists that your application may have had additional parameters which were not met. Take a critical look at your app compared to the class of 2023's profile available.
Reapply? You wouldn't be the first, lots of posters here who got in on the 2nd & even their 3rd try! SA's like that type of determination & you're a year older which can help with the workload, responsibilities, time mgmnt., etc. DD was saying just yesterday how much the priors & prep's brought a calming influence to the group when everyone else was freaking out about this & that...Use the Search function for those posts.
Service: There are other ways to become an Officer. Once you're commissioned, no one cares where or how you got here, just what can you do.
SAT/ACT? Lot & lots of posts on the forum. A tutor can get those scores up with math the easier subject to increase (the tutors words, not mine) but both can be done if
you put the work in. Maybe ACT a better test for you; lots of candidates find this to be the case.... SA's take both.
CFA/WCS: You have a whole year to crush, & I mean crush it. Get all of the other components of your WCS up.
Take some time to feel bad, then accept the results & move on with the plan. Good Luck!
West Point Military Academy
www.westpoint.edu