Girl trouble. Pleaseee help!

So theres this girl thats been my next door neighbor and best friend since about the 2nd grade. Throughout our lives weve both had crushes on eachother but always at different times so we have never gone out before. But recently I started to like her again so I told her about it and at first she was shocked and didnt know what to say. As the week went on and we hung out, I kept bringing it up and she finally told me she liked me but she didnt like me cause she thinks it mite be akward if we go out and she doesnt want to break our friendship. Well she left to go to new york for 5 weeks about a week ago but the night before she left we both snuck out and we made out and kissed alottt and talked about going out cause she finally admitted that she feels the same way, and decided that if we both still feel the same way when she comes bcak that well go out, I never truely knew the difference between wanting someone and needing someone until she left for new york. So I guess what im asking is some advice to keep her interested in me while shes gone and maybe something special I could do for her when she comes back. And tips on turning her on to bring back some old feelings just incase shes not as interested. Please please help me, she means everything to me right now. Shes all I can really think about