Aw, dear Linda Lee,
I hope you'll forgive my informality and familiarity, but you've given me such strength with your responses to my pain. I am so appreciative of your participation in this forum. I'm not trying to make this into a gushing session. I just think you have such a wonderful personality, such a trooper.
If I were in the situation that you have described (albeit minimally, so I don't presume to know the panorama) and was able to keep a cool logical person in my brain, I would tell myself to take some time out to soothe my adrenaline and anger. I have different needs in different circumstances, so sometimes I just write violently, sometimes swim till I'm afraid I'll drown from pure exhaustion, go rock climbing and take it out on the wall, go for a run with my puppy, watch Adam Sandler movies. Whatever. Then I would tell myself to compose a letter after I have collected my thoughts, maybe giving myself some time to think carefully beforehand and just take a little time off from focusing on my frustrations and instead refocusing on my needs. There's a difference there that is sometimes hard for me to find. But, you know, it's sort of just the typical switch from, "You are___" or "You do ____" to, "When I see you do ____, I feel _____" sort of thing. I often outline my letter before writing just to make sure I cover the points I want to, since writing can get emotional. I make bullets of what I'm trying to say and am as clear and non-aggressive as possible. If I start to get off track while writing, I refer back to my notes and regain my cool.
These are some things that work for me, though I don't always put them into great practice. It's an ideal that I try for when I have the head to remember these things.
And I think it is okay to tell your friends/livingmates/family/whoever that these words are not optional. They must be read and heard. It is a matter of respect and willingness to communicate, and when you share a relationship with someone, you have a right to those things. The right to express and be acknowledged in that.
A great woman once told me, "Hang in there, sister. YaYa!"