The best favor you can do for your son (and for yourself) is to immediately detach the “worthiness” aspect of this process from the outcome. Seriously. If you were my friend IRL I’d be recommending a good therapist (for either or both of you) ASAP.
If you are internalizing the “acceptance/rejection” nature of college admissions, only you have the power to stop it. You need to love the kid on the couch (or hiding in his room playing video games) and accept who you all are as a family in order to go in to this process with enough humor, detachment, equanimity, etc. to make it out the other end.
If your HS feels “judgey” to your son, than the way you, as a family, use language, help him become the best version of himself, etc. is critical.
I know kids in real life who trundle off to college and truly- it is sad to watch. What ought to be an exciting, door-opening experience becomes one more ticket to punch on life’s stressful and competitive hamster wheel. And instead of being a reset button to become the best of themselves, it’s just a continuation of a long, boring, anxiety producing marathon. Internships, fellowships, departmental awards, GPA, gotta study for the MCAT’s because if I can’t become a doctor what value is my life? I told one of them recently that I didn’t go to med school (duh), never wanted to go to med school (duh), never thought about med school (of course) and somehow I have had a career that I LOVE, a happy life, and even contribute to society when I can. I got back a look of disbelief- that it’s just not possible to have a successful adulthood without “fill in the blank” accolade.
Don’t let your son fall into this trap. None of this is about his “worthiness”. Kids who don’t get into their first choice college get into their second or third or 12th and somehow it all works out. Kids who don’t get into the top CS program in the country go to the 10th or 30th CS program in the country- or fall in love with urban planning or sustainability freshman year and never look back.
My first kid had a very thick skin, was pretty non-competitive except with himself, and we really didn’t have to worry about how soul-sucking the process can be. Plus he was lazy and charming which is kind of a dream combination. My next kid was much more prone to internalize “stuff”, and we had to work hard to normalize home life junior and senior year of HS. That meant finding time for baking, playing with the toddler next door, raking leaves, doing chores, volunteering (not for college, just because there are people who didn’t win the genetic lottery and it’s important to try and take care of them) and probably most important- spending time with fragile, elderly family members.
Hugs to you. Don’t let the school system (A is better than B is better than C) mess with your head.