Forenote about myself: Freshman year was the hardest year in my and my best friends lives. We were both going through very dark times in our life. And this song saved us.
Still, its about a person watching a loved one deteriorate. They are going through something so painful that they believe that death is the only answer.
So this person tries to make their loved one believe that no matter what happesns, things will always be okay. There's nothing so wrong that can happen that death is the only answer. You may think that it might be, but remember death is permanent, you can't undo it. That is the final answer. Is the pain really worth giving up your life?