In your dream, the girl represents a part of how you think. Having a sexual encounter with her symbolizes how you are drawn close to that part of your thinking without a real possibility of actually doing anything about it. For example; suppose you have thought about owning your own restaurant. You imagine how the place is decorated, you can see all the customers enjoy their food, you work your way through the room chatting with the people. You enjoy 'dreaming' of that happening. Now all the while you are entertaining yourself as a cafe owner, you are not at that point in your life to do something about it.(This is but one example...) Look over your life and see where you enjoy thinking about a certain thing, event, or person...but there is no action toward making it happen. God bless.