The level of unpredictability that exists between you doesn't bode well for the future of your relationship, unless there are plenty of other more grounding influences that can help to stabilize your connection. After all, a certain level of spontaneity can be fun, even exhilarating, but between you two it's likely to go overboard and verge into the realm of irritation. You just don't ever feel as if you can depend on your lover, or know where the relationship is going.
If you have a taste for the unknown, this could hold your interest for a while. Eventually, though, you will inevitably want more stability and commitment than your partner, and your relationship will become a sort of emotional push-pull between dependence and independence. This could lead to arguments, or it could just lead to a subtle feeling of never quite getting what you want. This issue will grow over time. You'll want emotional security, but the best you'll likely get is moments of intimacy that are interspersed with periods of aloneness -- during which you might not even talk to your lover much or know where they are! Needless to say, this kind of relationship won't foster the closest, coziest feeling in the world. It will be up to you to decide whether you let this be a deal-breaker of an issue or whether you find a way to loosen your hold, relinquish your expectations and enjoy the moments of closeness that you find together.