Does someone know how to suduce or get your ex-girlfriend back with you?

ok what im trying 2 do is to suduce my ex-girl friend, realize that she lost a really good guy or get her back with me. some facts about us is that we used to be really close friends. but then when i asked her out n then broke she treated me differently. but now were like being more friendly and stuff but i atleast want her to realize that she lost a really good guy who loved her with all his hearth and i would of give my life 4 her. so can someone please help me?