Don't expect this relationship to follow a preset, traditional path. It's far more likely to blaze its own trail, teaching you both a lot about yourselves in the process. You'll be very open and free together, and you'll rarely place artificial restrictions on each other.
Possessiveness will have no place here; you might even agree to date other people as well as each other. But honesty will always be essential to your connection, as will open, free and spontaneous self-expression. Even if you do commit only to each other, you'll always value your alone time, and you'll almost certainly maintain your friendships outside the relationship -- meaning, you aren't likely to be one of those couples that cut off the rest of the world and hole up together at home! Your bond will thrive on lots of outside stimulation. New ideas and fresh experiences will always be a priority between you, so be sure to nurture these to stave off restlessness and boredom. Put in the effort to actively seek out new experiences: Try out new restaurants, see challenging films, visit art galleries and museums, travel to new places together... Anything that puts an emphasis on creativity or challenging your minds and intellects will be an excellent use of your time as a couple.