Untitled (How Could This Happen to Me?)

this is definently an emotional song its kinda about someone who is looking at their life in perspective and how unhappy they are with everything they may have done, said etc. its about someone who wishes they could make everything better and just start everything over again. at the beginning i think its saying that the person is probably dying in some way and they are looking back at an unhappy life and wishing they could redo everything. i dont know it might have a suicidal undertone but i dont think theyd do that