You start out strong together, with a vital and passionate connection. But soon you both start to notice that you're arguing or struggling against each other more often than you're actually working together. You're a high-energy, dynamic, creative, passionate person, and it seems like bringing those energies to your lover's life could only be a good, exciting influence.
Except in this case, your energies are too much for them to handle. Your relationship could become more like a tug-of-war than a romance, with each of you -- and you, especially -- yanking mercilessly at your own end of the rope. You challenge this person relentlessly, and not in a positive or growth-oriented way. You could lose sight of the fact that this is supposed to be a relationship, not a competition! You're supposed to work together as a team, not act like two opposing teams who taunt each other from the sidelines. Needless to say, all this excessive energy and aggression leads to plenty of arguments, in which you both probably try to represent your own point of view instead of listening to your partner and responding to their needs. If you allow this aggressive energy to continue for too long, the relationship could be lost. It's hard to commit to something that's more work than fun, and after a while, that's how you both come to see it.