Did you two have trouble walking a mile in each other's moccasins? Was it difficult for either of you to view things from your partner's perspective? In arguments as well as in day-to-day life, were you both so attached to your own points of view that you just couldn't comprehend where your sweetie was coming from?
If you answered 'yes' to any of the above questions, it may be because the two of you lacked any oppositions between you. An opposition is a somewhat stressful planetary connection, but it does something very important: It provides a wider perspective than just your own. Oppositions bring awareness of The Other and the ability to see things from your partner's point of view. Not being 'in opposition' to your lover might sound like a good thing, but look at it this way: It's like you're each going in your own direction, but your paths don't align. They don't cross, and they don't run parallel. You're each simply moving along on your own track, one that's noticeably unrelated to your partner's. You each thought you knew the other, but if you had taken a test on each other's likes and dislikes, you probably wouldn't have done as well as you thought. There was a basic inability for either of you to look across the table at the other and see the person who was actually sitting there; you both had a strong tendency to view the other through your own looking glass, which distorted the picture. Finding the balance between you required a lot of awareness and honesty on both your parts -- difficult, but not impossible if you had wanted this to work out.