This aspect will be a difficult one to handle, as it will bring up a lot of anger, resistance, rebellion and aggression between you. Even if you're usually even-tempered, expect to be provoked constantly by this person. You just won't be able to stay calm around them, and at times you'll get the feeling that they're actually provoking you on purpose -- and you may be correct.
The ways that you'll express your anger will tend to be extreme, because they'll push your buttons and bring up deep feelings of anger and resentment. Basically, with this aspect influencing your friendship, power struggles will be inevitable. So how will you deal with it? The best way to do so would be to stop struggling -- to realize that you have no power over each other, not really, nor should you. There are lessons to be learned here -- about not allowing your buttons to be pushed; about finding out where all that deep-rooted anger is really coming from -- but they'll be difficult lessons and any positive effects will be hard-won.