There is no easy way to do anything if you're both angry and upset. But, because it is important to you, you will need to clear your chest. Wait until the anger is no longer the strongest emotion you feel when approaching this person. Concentrate on the positive aspects of your relationship with this person and allow the more positive feelings to arise before you say what needs to be said. Consider what this person means to you and concentrate on an outcome which will benefit both of you, without having to be RIGHT!! Don't go in angry and be sure to explain how important they are to you even though things aren't travelling smoothly. Saying things like "I feel angry when I think you're attacking me", instead of "you attack me".... etc. I'm sure you've heard it a million times. Try not to lay blame, try instead to make clear how you feel when you think someone is doing something to you. Often times it can be a misunderstanding that a few simple words will clear up - but words spoken in anger make for an argument which could go on indefinately. Best of luck to you.