What Can I Do To Win A Girl's Heart?

I had known a girl for over 2 years. At the time I never expressed to her how much I liked her even though we were very good friends. One day we got into an argument which I later apologized for. This was over 6 months ago. I have only seen her once since then. We talked for over and hour then and things seemed to go well. I now realize how much she means to me and would like to get back together with her. I am not sure the best way to approach her after 6 months. Looking back I think she really liked me but I did not pick up on her signs. At that time I think she gave up on me because I did not show any physical attention. Ladies, what could a guy say or do for you to win you back? What could a guy say to win your heart?

Guys, also. Any good responses that worked for u in the past?