Mentally torturing and forcing me to marry

I am 21 years old and my family is financially good. My sister is getting married which is love marriage and is intercaste at first my fqmily was against it but after 2 years somehow my father agreed but with certain conditions , so to maintain good image among society my father is forcing me to marry and doesnt even care about my future studies. I am mentally exhausted by the amount of torture he give me. I am battling depression since 2 years and have suicidal tendencies. I want to be an independent woman and want to study abroad. but my father is forcing me to leave all my studies and get married against my will so to maintane his reputation. He mentally tortures and blackmail me. At first i thought of committing suicide as i had no choice left then i talked to my friends regarding this. I just need help what should i do in this situation.