make it really sweet and pick her up by the waist. or make sure she is standing on a step or the curb on the road. if you are meant to kiss her, you shouldnt worry about how. it will work out if its meant to happen. plus a sore neck is no worry when you had a kiss.
Hmm...I never had that promblem I am 5'9" and a half I always was tall for a girl well woman now even in school I was always the tallest girl in my grade. But like the others said just bend over and kiss her.