I need a song about a cheating fiancee...?

My fiancee and I have been together for about a year and a half...About 4 months ago he started talking to his ex girlfriend that broke his heart twice...I thought they were only talking about stuff friends talk about but I glanced through his phone one day and was hurt at everything I read...they were talking about how she wants him to choose between me and her and instead of him replying with no he says it's a hard choice to make because he loves us both...well he told me that he would tell me if she talked about any of that again and I believed him but he broke his promise and not only that lied to me and went to "walmart" to get stuff and met up with her at the bingo place her parents go to and kissed her...he came clean to me with all this and I haven't exactly had my breakdown of crying over it...I forgave him and he hasn't talked to her since...So I need a song for all of this... sad, angry, just something perfect please...