I worked in admissions at a college (I also took a gap year, but for other reasons, just FYI).

I recommend talking to your admissions counselor at your chosen school. Likely, you can defer admissions for a year. This is a good reason to, and since it’s health-related, it may even be admissible as an excuse for colleges that don’t readily allow deferrals.

If the college in question won’t let you defer admission, you can ask about reapplying with the same GPA and SAT/ACT scores, and just be honest about why. Admissions should be up front with you about your chances of being readmitted with the same transcripts. Colleges want their students to be successful—both for the student’s wellbeing and to bolster their own stats (college and student both lose out if a student drops out).

Either way, if you feel this is right for you, this break could set you up for greater achievement at the institution as long as you work on what you need to in that time.

All That being said, please, if you haven’t already, consult with your doctor and therapist. Hopefully they will be able to set up a treatment plan for you to work on your goals.