Public Display of Affection

My cousin and I were in a small room, the doorway had a blanket covering it up, instead of a door. Some guy walks into the room and I am sitting on the floor reading a book. He starts kissing my cousin, disregarding me. I then start to punch him in his face but I am horrible at it and he laughs at this and calls me a "Fat ass". I ask my cousin if she heard what he said. He says, "Well, it's true". I then yell out, "You piece of shit" and I guess I did so in real life as well because I woke myself up again! I don't understand the whole yelling out things in my sleep but it's happening again as it was some months ago.