@Theodosius: I know the burnout part, although so far I've found an old Russian proverb (I think) to be very true: the bear that knows he walks into a trap cannot be caught. Although I only recently realised it, this lifestyle became the standard for me about 3 years ago, and I've always managed to hang in there because I knew what I was fighting against. At some points it was just sleep, food and school, but I never burned out accidently. I used holidays to recover a bit and would go on to the next holiday. My grades are pretty good so for a really long while I saw no reason to worry.
Anyway, I know what you mean with your second paragraph, but it's not that simple, and here's why: we're not talking about addictions to alcohol or smoking or stuff like that, we're talking about adrenaline. I can't just stop 'taking' adrenaline, for obvious reasons. Now, of course, I can stop doing anything that could be considered exciting, but first of all that would mean I completely ruin my condition, next to the fact that it would be extremely boring which is not that important, but more to the point, this is why it's pretty much impossible: I still have school. Because of the adrenal fatigue, there will still be times where I'm running late because I wait to the last moment to get out of bed, in which case I will have to rush, which will increase my adrenaline, all the while I enjoy every moment of it. Then there's the fact that even if I have all the time of the world, I actually have trouble trying to cycle at a normal speed because I simply never do that, and if I manage to not run on adrenaline, the fatigue kicks in. Add PE to that and you probably start to see the issue. I can't just quit adrenaline, or at least I shouldn't. Remember that while I want to reduce the adrenaline stuff, I still enjoy it and I see no need to get rid of it entirely. It just needs to stop being the thing I do every time I get out of the house or want to have fun. It needs to become just another aspect of life again, to be used when I really need the boost instead of any time I'm outside.
I need to learn the normal way of doing things as well, and find normal stuff that gives me satisfaction, to get rid of the tiredness as well. I don't want to become your average 16-year old that does... well, nothing useful. I want to find a better balance, not completely throw myself out of the window in exchange for a new 'normal' me. I am too ambitious to become 'normal'. 'Weird' works just fine for me.
So, the plan: I want to try to find a calm hobby or activity that I enjoy, which will be extremely hard, so I'll focus on other things until I found such a hobby: I will actively try to not get excited or anything to prevent boosting adrenaline production while walking/running and cycling, although ideally I do want to keep some sort of a condition, so I would be turning it into more of a training or fast 'walk around the park' rather than an exciting adventure. Focusing more on keeping a calm rhytm rather than trying to go as fast as possible.
I know, right? Nothing conclusive so far. I want to do less activities but stay in condition and I want to find a calm hobby although almost everything that's calm bores me. While I do think I achieve something with those changes, it's probably not enough.
So how the hell do I actually make a change other than some nuances?
First of all, make sure I sleep a lot. If I don't feel tired this much, it's much less of an issue and it will probably help me enjoy the small things in life. It would also mean I don't run late for school as often, so less adrenaline going to school.
Then, this is where the girl comes in. I just know that she knows how to stay in condition and have fun without relying on adrenaline. Other than that, she'll probably help me get a calm hobby. Hell, depending on how things go, she might even become part of my hobby in a non-dirty/creepy way, or hell, perhaps in a dirty way if that's what she wants, but that would be a byproduct and completely beside the point. I just think I need some guidance from my classmates to actually pull this off, and I'm willing to ask for the help and I think at least one of them is willing to help.
I wanted to say something else but I forgot and I don't want to think about it right now :) Tips are welcome, just hold in mind that I consider completely getting rid of any active activities is just as bad if not worse than my current lifestyle IMO. Balance is what I'm looking for. Also note that I'm holding out just fine, this is just a clear point of improvement to me and I personally believe that I should therefore actually try to improve it.
Really, tips are very welcome. Something that just came to mind as potential hobby is swimming. Although that's not too calm, it's still nice and not exactly adrenaline-pumping action. It also means I will stay in some condition so I don't have to worry about that.