What happen......?

Why did you go to that party..... if all you where going for was to show me the new girl that you have by your side now.....why do you do this...it's hard for you it's even harder for me....what did i do to you for you just to leave me......you promise so many things i guess those were lies....? just like when you broke up with me you said it wasn't another girl... that you just wanted to be single and that i was always going to be your babe that no one would take that...what happen to that.....??i still ask myself........what happen to that...?!!