How to turn friends with benefits into a realtionship?

I have hooked up with a guy 3 times and slept over at his place twice. On the third time he took me to dinner the night before, we rented a movie, and went back to his place where we watched the movies and then hooked up after. In the morning he took me to breakfast and refused to let me pay. At the beginning of this thing, he said he thought we could have alot of fun together no strings attached (hooking up after parties, etc.). I really feel like we have a connection and we have alot in common. His last gf cheated on him and they broke up almost a year ago. Any advice on how to turn this into a relationship or how to get him to think about me as more than a hookup?