Is This The End lyrics

Is this the end? Then why does it feel We'd only just begun I thought we were done I think I'll hang on If you still want me But if you don't I guess I'll move on And if you need me Close your eyes and dream I'll give you back your key But will you be happy? Will you be happy? Said we'll leave it alone But I wont be here long And when I'm gone I guess then we'll know