How to lose my feelings to my mean cousin that always make me mad?

my cousin is always annoying me and she keep doing that to make me cry or mad.... she likes to see me so mad.. everybody never want to help around me... they said "just ignore her"... and she always say badwords.....call me dumb.... she knows that i'm so sensitive... and I dont want to have any feeling... cuz it hurts to hear that... I wanna kow, how to ignore some1 who lives with u?