My girlfriend deamed about someone else yesterday?

yesterday night she told me she wanted to be honest with me . i wasnt expecting her to tell me anything bad because hse mentioned IT WAS A DREAM. ? she told me she wa at school and there was a group of guys laying against a wall . well , her friends went up to them and started twirking/ dancing on them. they asked her to join. she join them and was twirking on the same guy guy she walkied to school with that morning in her dream . throughout her dream she just kept seeing that same guy . my feelings are hurt because nothing in this dream had anything to do with me . weve been together for about 1.5 years now . i know some of you probably wouldnt think of this as " that serious " but there different boundarys in each relationship in which you dont cross and in mine we dont dance on other people . this rule was established after she went to a party . she told me she idnt want to dance on anybody , she was jus going for the food . ( and i believed her ) well, one of my friends text me some pictures of what she doing at the party , and she wasnt eating ..... nor was she dancing ... two men had picked her up in the air by her legs and arms , while a third man had his hand inbetween her legs. ( now that happened in the past , so back to the dream ) so now im worried and even a bit jealous of whoever this guy is . the guy in the dreamm wasnt anyone she was familar with , but im just waiting to see if she see him anytime soon at her school. i dont know what to do ? i seriously want to break up with her , but i know it'll be comepletely unnnessary, because after all ,its just a dream rite?