Why does love hurt ?

Why does love hurt? Who are you love? Where do you originate? Who created you? Why do you hurt so bad? People are in jail because of you Children have become orphans because of you People are dead because of you Mothers have become widows because of you Why do you hurt people so bad? Why does everyone who lives on this Earth complain about you? Is it because you are unique? But why do you actually hurt people so bad?