You're immersed in each other's emotional lives, constantly trying to figure out what the other is feeling. While it's wonderful to try to meet your lover's needs, it's unrealistic to do it all the time -- and you run the risk of overlooking your own needs, because you're so caught up in your partner. You might just not know what you want out of the relationship or out of life in general -- or you just don't tell your partner, which is very confusing for them.
You could have a feeling that you're unfulfilled, that things aren't quite right, but you don't know what you need or how to get back on an even keel. While your lover tries to be everything you're looking for, that isn't always possible. Your visions of each other are so muddy and changeable that it's hard to keep a clear grasp on the relationship in general, and on each other's hearts and minds in particular. You could even fall into the habit of misrepresenting things -- not necessarily out-and-out lying, but not sticking strictly to the truth, since the truth is so difficult to pinpoint when you're together. Honesty and understanding are hard to come by, and sooner or later, you wake up from the dream of your relationship, feeling disappointed by the fact that you don't really know each other very well at all; that your bond isn't as true or intuitive as you thought.