Assertiveness/homelife

i live with some one very well triggering i dont wanna say too much but tonight im proud and shaken up. she did it again only tonight for whatever reason i stood my ground, still quite timidly but i didnt have the energy to let her get to me and im so tired of her been the reason i resort to xxxx. now an hour later i can breathe again, but im still shaking, i have never done that, she still laughed in my face, still got smart and didnt have any respect for me but i stayed in the room and showed her i wont be the girl who runs to or hides in her room anymore. but im surprised at her reaction, i know its not me, its her choice how she reacts, i know im not bad or not good enough(as ed says) that it is her that is been out of line and having difficulty adjusting to having share things and well not always get her way. but im sitting her and while i breathed through the urge for one behavior told myself im ok, im sitting here afraid to now re-enter the room or go in and get my snack. i just feel anger so much anger, and confusion. i sense so much resentment more so lately, maybe it was always there. but in the middle of been mad at myself for not totally winning tonight i still deserve credit for fighting and trying and not reacting like i usually would. despite how tense it is i know im the better person, i dont feel the need to apolagise for anything, unlike in the past where everything was my fault. recovery isnt just finding my place in the world and life its takin it back at home.