I'm sorry if you feel misunderstood or disrespected, and I want to make clear that I don't think there can be an age limit for the right to die. That's ridiculous.
I do take your suffering and general experience seriously.
Ultimately it's the sufferer who should decide. Your suffering, your life, your choice.
And yes, I don't know what your future may hold (to be fair, neither do you). Heck, I know basically nothing about you. Only you can assess your situation here.
Sorry if what I said seemed like bullshit bingo to you.
Just understand that we as adults have a special responsibility for underage people on here, and the right to die for young people is, as you can see, a highly controversial and complex issue, even on here. It isn't taken lightly, and rightfully so, as this is one of the most important decisions of your life, possibly your last, so understand where I am coming from.
Lastly I'd like to say that you do seem mature for your age, and I assume your decision is well thought through and not a rash impulse. As hard and tragic this is, I respect your autonomy.