Despite your best intentions when you begin this relationship, once you start spending time together and becoming more intimate, you'll find there's a serious conflict between you regarding freedom and commitment, stability and unpredictability. This may come to light as one of you takes on the 'stick-in-the-mud' role while the other assumes the role of the erratic partner who can't be counted on; you may even trade those roles back and forth from time to time, though it's likely that neither of you will fully deserve them. Still, something will happen when you're together that pits your partnership against the urge to be free and unencumbered.
You might get into sudden, fierce arguments as a result of the built-up tension, or you could even decide on a whim to end things, without even trying to resolve anything or see if there's a way to create a little more balance. One way to establish balance will be to make sure that neither of you bottles up your feelings, your needs or your anxieties. The success of this affair will depend on airing your grievances and communicating openly about them so that tension won't build up beneath the surface, leading to a sudden and unexpected explosion of tempers.