I need peoples dior help quickly?????

Question

Okay so this guy he isnt neccesarily my boyfriend because we live over 200 miles away from each other but we met at this camp thingy, fell in love and he told me he cant spend another day away from me even though its been a week since we left the camp and he is coming to my hometown to see me anyway...I invited him to stay at my house and my mom being the strict german she is only let him sleep in my bed in my bedroom and I have to sleep on the floor in my sisters bedroom! to be honest my bedroom is a dump and its so plain...what can I do that would impress him or a question to guys when you see a girls bedroom what impresses you? I have a double bed and its more of a rectangle room then square! and also he is a bit punk rockerish and emo but not too much so what can I put in the room and decorate it so he would feel cosy and be impressed?