Sleepwalking or ghost?

Byron is magical, spiritual place - i knew that already before i arrived. I lived for month with my boss because didn't have anywhere else to live. He had recently sad event in his family, his granddad died. Two night later he saw somebody in his room around 4 am and this somebody looked like me. He called my name, but there wasn't any answer, this figure just moved closer and then away again but didn't say anything. He called again couple of times my name because it looked like me. Then he turned lights on and by this time the room was empty. Next day he told me that he thinks that his granddads spirit game to visit him. Then i had de ja vu.....and i told him that apparently something like this happened before. I was living with 10 people before Xmas and in one room there were two German girls. One of these girls granddad died few nights before i did same thing to her. I was sitting on her bed and staring at her without saying anything. Exactly 4 am. She called my name few times, i moved my face closer and farther again and then i just left. I wounder what was this: ghost or something new for me-sleepwalking, never done it before.