Need some advice

So my family has forced me to get married to a guy who they think is really nice, but I dont he just has money. From what me and the people close to me they see that he only acts nice arounf them and behind closed doors only wants physical attention. I am not happy in this marriage and my parents know that, but I dont want to divorce him because of the reason that my whole family will disown me for sometime. I have people who will help me get by if i am on my own but I dont know what to do. Do i stay in the marriage and satisfy my family or do I leave and start new with my own happiness. By the way I have had a boyfriend for the past 4 years and he has been with me through all of this annd is also wlling to help me and also marry me but my parents dont like him, but he is such a sweet and caring guy who makes me so happy. I need help.