Good Song for This Situation?

i want to make a music video on flipnote hatena. I want the song to be about... like as if you were in a situation where a guy breaks your heart and then when he starts dating other people, they break his heart(karma). NOT THE SONG BEGGIN ON YOUR KNEES lol. or a situation like a guy breaks your heart and you'll do ANYTHING to win him back, like if your saying sorry for everything. or ANYTHING about being heartbroken and wanting that guy again, or if you dont kno who you love. Any of these situations will do... sorry this iz long, Pleaze and thank yhu!!