.... If you are wanting girls to think your sensitive DON'T! Girls say they like sensitive guys but they are not wording this properly. They want a guy who is not an *******. They want someone who is understanding not someone who will whine and cry all the time. Crying in specific situations is okay but not consistently unless you are illegitimately going through some tough sh**.
First off you have to engaged in the conversation or activity. Show that you are interested in what the person has to say or do. Ask question and make sure you listen because people love to talk about them selves. If that doesn't work just put on a great smile and shake your head with the occasional "Ooo and Ahh" :) Good Luck!