Hypothetical Regrets

What if you left today and never came back on tomorrow? What if I never felt your arms wrap around my body again? And what if then your compassion was just a memory of yesterday? Would I lose my mind? Would the sun fail to rise, and the water cycle cease leaving all of life to perish? Would I perish if I could never wake up and see your face again? What then does the day become? And suppose I never had the chance to say, I love you...