Asking forgiveness from one's relatives

My niece had a proposal fixed n kept meeting in my house.i ws not well yet i cooperated. But she n her mom came late n the boyside came earlier than scheduled time. my husband had gone for namaz. i panicked when she came it was late n i as a hypoglaemic lost my temper due to hunger attack n told her something loudly in kitchen which were insulting words to the boy which he heard in the hall and broke the proposed engagement.since then i m begging for forgiveness from niece her mother,the boy .offering gold n money n even sawab of my umra but my niece refuses to forgive me n has orderd my sister to break relationship wit me.she curses me n uses bad words n filthy language for me n my innocent girl. What should i do now? I m taking treatment for anger issue. I m feeling very sad and depressed.