I am getting married soon and I am not in love with my fiancé

I am about to get married in the next two months and I do not think I will ever fall in love with my fiancé. He is a gentleman and we have been talking since past ten months but I do not feel attracted towards him.

I am not in love with anyone else but somehow, I do not feel those butterflies in my stomach or any connection with him. Again, I would like to mention that he is a nice man and it is me who is not able to feel happy with him. Is there something wrong with me? Should I talk to him or call off the marriage? Please advice.