Your dreams dont have meaning, theyre just pieces of your days events and subconcious all scrambled up in your brain to make a picture show at night.. ive been dating my girlfriend for over a year and i still get an occaisonal "cheat" dream i usually just disregard them, likewise my girlfriend ALSO gets those kind of dreams, they really dont mean anything, but maybe you should feel refreshed that you felt guilty about it in your fream and when you woke up , it lets you know that you feel SOMETHING for this girl you were with for 5 months. But about the dream, i seriously wouldnt worry about it, everyone gets those occasionally. I was a little freaked out too the 1st time i had one but eventually i just stopped having them as i got closer and closer to her... youll be fine just dont bring it up its no big deal.