With this aspect influencing things between you, your partner shouldn't expect a calm, ordinary relationship! You could go through a lot of ups and downs together, and you might never come to a place where they, especially, can really trust the bond between you, unless other aspects have a more stabilizing influence. At least things stay exciting!
Whether that excitement verges into the realm of untenable depends on your individual natures, but it's likely that you find it easier to deal with this instability than they do. There is a feeling of change between you; your lover is never quite able to pin you down and get a commitment, or even a straight statement of your feelings or desires. Instead, it feels as if you're constantly evading their advances, like a complicated fencing match with sexual overtones. In fact, sexually, this dynamic keeps things very interesting -- because there is a feeling that if your lover doesn't keep changing it up, you'll lose interest. After a while, your partner starts to wish they could have a more reliable connection with you. The pressure of coming up with new rhythms and positions in the bedroom can be daunting for the best of us! This aspect makes it hard for the relationship ever to deepen into something more mature than a fast, fun, wild ride, and it could make things contentious between you if either of you reacts to the instability by getting upset about it. The best strategy is to suspend all expectations, because they probably can't be met anyway.