When you sleep and dream of the same thing over and over, your subconscious mind is taking over. If he is dating someone else, I would say no to the hotel room.
Well he's with another girl so if you had a boyfriend would you want him to cheat on you or mess around with another girl? I'm going to guess no. If he liked you for anything more then just fooling around and then he would probably end things with his current gf and go out with you. If your just looking for some sex I doubt it would be hard to find another guy you think is cute. Besides if he's willing to cheat with you even though he's with his current gf I wouldn't think that he's all that good of a guy. Good luck though.
I agree that if he is with someone else it would not be right to get a hotel room with him If you are dreaming about him all the time you must really be into him. But think about it if he is talking to you all the time what does his gf think. You don't want a guy like that....
If he wants to cheat on his girl this should send you a big red flag to start. If he had genuine feeling that could actually go somewhere, he would end it with the girl first and take you on a date, not just a hotel room. As for the dreams... You need some closure.
I'm 17 and I have been dreaming about the same guy and children in my dreams since I was like 15, its never a different guy or children. In my dreams hes my husband and there my children I have a baby about 1 year old and a 3 year old and there both boys. I don't understand what it means am I dreaming of my future husband and children?