Dream of girlfriend, ignore

I and my junior apprentis are refreshing ourselfs,i was drinking bottle water and coca-cola pet bottle,my ex- girlfriend came in,drink a mouthful of the coca-cola and left to their house.on our way home we go via their house,reaching their house she was sitting outside with her girlfriend ,i talk to her but she ignore me,she look sad.i talk to her friend and she answered me.i then left them in the dream.this foretells