You both have an instinctive idea of what's good for each of you and the relationship, from the very start! Even if there are other, more troublesome aspects between you, this one helps warm things up and stabilizes your bond. This relationship is characterized by growth and success.
You both go through some changes as individuals that can only be brought about through your connection with each other. These changes could be internal -- perhaps your partner, for example, has been struggling with some aspect of their personality or their past for some time -- or they could exist outside the normal scope of your romantic connection. For example, during the course of the relationship, you might choose to go back to school to advance your education, or your partner might change jobs in order to move onto a career path that is more closely aligned with the type of person they really are. These kinds of major life changes are supported by this relationship, as you're each able to offer one another a type of unconditional support and encouragement that makes both of you feel optimistic, even lucky, as if you can't go wrong. You discuss all the changes you're undergoing with each other, and listen with an open heart and an avid ear. This aspect lends a foundation of friendship to your romantic relationship that could help you make it last long-term.