when ur at the park and the sun is just setting sit on a small hill sitting beside her. While ur talking randomly change the subject and tell her how beautiful she is (by the way iunno about other girls but i hate it when guys call me "HOT" it pisses me off so just say shez pretty or beautiful and don't ruin the moment) Put one hand around her her waist and one hand on her leg and pull her close to you while looking in her eyes and kiss her :) she'll love it!