Is it possible to love someone after marrying him?

I'm going out with this guy, whom I've known for years. We kind of grew up together. Our families are very close. I was in love with a different guy, but it didn't work out, he didn't like me as much as I loved him, he would disappear and reappear from my life, and we broke up. My family and friends didn't like him. Now I started going out with this guy, and he knows I'm not over my ex yet, and he thinks that its ok. He is handsome and many girls like him, but I don't like him that way. My family is the one that thinks that he is the best for me. His family is nice to me and everything seems perfect but it doesn't feel right. Not thinking about by ex is becoming impossible for me , makes me cry whenever people talk to me about him, and I met him a month ago, I could tell he wasn't over me either but I've heard he has a girlfriend. Now this guy wants to get married, he is a nice guy, I know he loves me, and all my friends and family think that we are perfect together. This kind of makes me to think that I might start liking him after we get married. Any experiences? plzz help, is it possible to move on and fall in love with a guy for whom you have no feelings after marriage…