Does anyone know of any poems on Betrayal particularly friendship betrayal?

My best friend recently started a relationship without telling me with my ex who she knew was the only guy i trully love and wanted to get back with more than anything in the world and who also is the father of my 3mth old baby. I want to find a poem to express my anger and rage towards her betrayal. Yet the confusion I feel because im still madly in love with my ex and cant seem to feel any anger or hurt towards him.