The attraction between you is so strong and exciting that it may have inspired you to jump right into a full-blown relationship before you knew each other very well. But the attraction could be based on a sense of unpredictability and excitement that isn't easily sustained. Things between you, at least initially, felt exciting, new, unexpected and unique.
Your interactions were spontaneous and led you places you didn't expect to go; you're social together, and you blend your groups of friends. That's all fine and dandy, at least until things start to go awry -- if they haven't already. At best, this aspect keeps things interesting, but it's likely that interesting can fast become uncomfortable, if you're not diligent. You can't count on your bond; your partner probably had a hard enough time committing to you in the first place, and you might even find that their feelings toward you change as fast as a pendulum swings. They need a lot of space, and even if you do too, it won't often be at the same time, so your rhythms may be off in terms of your relationship needs. After some time, this person may have become more unreliable as a partner -- showing up late for appointments, canceling plans at the last minute and so on. None of this can foster any feelings of groundedness or unity, and the relationship will be hard to maintain unless there are other aspects between you to promote a feeling of being settled and satisfied.