As time goes on and your relationship has progressed past the courtship stage, you take on some pretty unfortunate roles. Your partner is the aggressor and you are the pushover. Needless to say, this isn't the best way to foster a loving, mutually supportive relationship!
Somehow, your moods are too closely tied to your lover's behavior. If they're feeling active and aggressive, you take it personally, even if it has nothing to do with you -- and you shrink from the powerful energy emanating from your lover. That kind of cause-and-effect behavioral pattern sets up some tricky habits in your relationship, habits that are hard to break. Instead of giving in to this influence and letting it control your relationship, you might want to ask yourself, What's so scary about my lover acting angry or aggressive, or even just passionate? You might find that there's really no real threat -- that it's just your buttons being pushed, and you responding just as you're programmed to: being the pushover, backing down in the face of a blustery display of energy. Your partner has to learn to tone it down a bit and control those displays of emotion, while you have to learn to stand up for yourself. In the end, this could be a mutually beneficial learning experience -- with some real effort on both your parts.