Hello.... fellow 17-yr-old high school senior here! I have also been having existential crises over the future and what it holds.
I am also impressed with all the efforts you have made and the determination that you have to get better. I would never have the courage to go out there and seek professional help on my own, so that in itself is commendable. I believe that if you have the mindset to get help for yourself, you're already halfway there. As for being a minor, we're just going to have to stick it out for a few more months, aren't we.
Do not withdraw your apps! Do not withdraw your apps! You've already gotten into 2 places, that's great as a safety net so just wait on the school you want to go to. I have friends who haven't gotten into anywhere yet, and have to live with unbearable uncertainty until April. Do not let this process wear you down. If you've had official diagnoses for your issues, do the places you've applied to know this? Is there some way you can write to them saying that you deal with these issues?
A few months left until 18, a few months left until college. I still don't really know whether you're looking forward to college or not... I don't really know what else to say except for I'm thinking of you! I really relate with all the high school senior 17-yr-old stuff, so that's mainly what I wanted to tell you because I was much too cowardly to ask for outside help, unlike you.
- AJ