I really like this girl.HELP ME?

Ok so I was on a family holiday 2 years ago and we met up with some friends who were also holidaying and I was spending alot of time with their children.I became very close with Zoe.one day she asked me if I liked her and in the heat of the moment(I think adrenaline) I said no and was a bit of a jerk about it. Truth is I actually love her. She is 14 and I am 16. We haven't spoken much since.although we live in the same town( only have short conversations). I have her number. How should I approach her about this? Should I apologize? Should I get straight to the point or be friendly and ease into it after a few weeks? HELP. It's driving me insane. I miss her so much.