Torn between my heart and my family.

I am in love with a Nigerian man. I myself am Ghanaian and we have been dating on and off for a while. He proposed to me and I turned him down ( something I have always regretted). He is the only man who has truly been able to put a smile on my face even when I am upset. However, I was not sure of where the relationship was heading. We have known each other for 4 years and his even yet to introduce me to any of his friends and makes excuses when I try to get him to meet mine. I recently met another man who is Ghanaian, through a friend. He is very nice but initially I was finding little things about him annoying. He has also proposed to me and wants to marry me by the end of next year even though he does not know me that well. I do not have such feelings for him but feel it will develop with. The thing is that, my heart is with the Nigerian man but my parents will dis-own me if I marry him.