Hey, Justin. Wow, you opened up a really deep discussion, didn't you. As we respond, you will find a myriad of opinions and reasons for and against. May I suggest you go on the net and look up Dr Kevorkian. He is the one who originally opened this can or worms that started a national debate.
As for me, I just went through years of seeing my brother suffer. He wanted to die. Yet in the end he was very frightened. He had signed a paper years ago telling his doctors not to save him if he was in danger of dying. They did not follow his order so he lived on after coming close to death because they did a procedure that kept him alive. A doctor called me to ask my permission for the procedure - he said my brother would die without it. I told him I could not help my brother die but my brother had made the decision himself and nobody should have asked me. Mother also had a paper signed. A nurse told us to guard her 24/7 if we wanted that paper honored because doctors would give her medicine that would keep her alive and she'd most likely be in a vegetative state - something we knew she didn't want. Nor did we. My sister and I kept a vigil beside her bed and sure nuff the dr tried to persuade us to let him insert things that would keep her alive. We said no, leave her in peace. She was 91 years old and her zest for living had long been gone.
Every case is different, Justin. You are so young and life is so very important. When you grow older, go back and read your report. You might find that your maturity gives you and entirely different perspective. Or, maybe not.
Good luck......