Mental harrasment/ Emotional blackmail

My institute director blackmail me about my relationship...beacause she know that my parents don't know about h my relationship any they will restrict me from everything if they know about this...I m in a relationship from 8 years but my parents don't know about him and I m waiting for his job till I don't want that they know about him... now I m sick about this problem and tired to fight about myself but they always make a way to blackmail me and its make me so depressed....and she will only do with me not everyone....like I go with the cab to institute which she provide as a convienced but it make me suffer do much she find daily newway to hurt me or blackmail me is it wrong to talk with my bf on call in cab but she find I love you word is wrong word she said you don't talk in cab I m adult and I have my rights to do things of my choice it's just a example she do with each and every thing she find my everthung wrong and blackmail me that I'll talk to your parents about this thing and its haunting me please help what I can do this...can I file an fir of mental harrasment against her...I'll give lot of many more example she didn't provide educational facilities I have to fight for this also I have to fight for the fees issue and many more