This aspect will be a really difficult one for both of you to handle, as it will bring up so much anger, resistance and even aggression between you. Even if you're ordinarily quite placid, expect to be provoked more than you might think possible through this friendship! Unless other aspects between you can help create a feeling of understanding and commonality, you'll have a hard time getting along together for long.
The ways that you'll express your anger at your buddy could be extreme; somehow, they'll bring up the deepest, strongest feelings of rage and resentment that you have hidden in the depths of your soul. You'll have to work hard to learn the lesson that this influence offers -- how to calm yourself in the face of rage; how to be a good friend and treat people well, even when you're feeling as if you can't stand them. Expect battles and power struggles. In the end, you may decide this friendship's not worth it.