terrible dream last night, what does it mean?

Ok so I had a dream last night that me and Cooper (he's the lead guitarist in my band, and one of my guy best friends) were on a board walk doing acoustic sets together playing songs that our band does. Then we walked around boardwalk and he pulled me into a changing room. I was really confused, then he held my hands behind my back and raped me, while I was screaming for help and crying my boyfriend's name. When he was done, he took my phone, called my boyfriend , and said that I "cheated on him." And I had a melt down when I woke up. Does this mean something ? Will Cooper actually try to rape me in real life? He's like my older brother and I would be so hurt