Your bond has been very strong from the start, which likely gave you a sense of fatedness -- as if you're somehow supposed to be in this relationship, as if it's larger than either of you as individuals could possibly be. That feeling has arisen not from any actual karmic destiny, however, but from some basic differences between you that create awareness on a variety of levels. You each will remain focused on your personal growth throughout the course of this relationship, and may pursue that growth to the detriment of your bond as a couple.
Either of you may end up feeling ignored or overlooked as a result, as if your individuality isn't as important as your lover's quest for soul-growth. And the truth might be that at any given moment, the individual growth of either of you could be more important than your bond as a couple. Though this doesn't have to be a negative thing, it is likely that you're both threatened by its influence, and you both respond in one of a few ways. You might try to assert your own vision of where the relationship should go, which will result in ego clashes. Or you might identify this urge to grow in yourself and your partner, and end up having overly high expectations of one another. The best response, of course, would be to try your hardest to support one another mutually in your personal growth arcs, and honor your relationship as well as your individuality.