This girl long distance help?

Ok, so there is this girl I met on the beach on vacation. We both were there for only a week and we started to like each other a lot in such little amount of time I didn't think it was possible!we still have a lot of feelings for each other. It's been about a month now school has started for me(not her) and we still text everyday. But, what scares me is that at some point, whether it be me or her, will find some one and move on or something like that. It's just she really means so much to me and I don't want to lose what we've had together. I didn't think that I could find such a perfect girl for me which is why I don't want our "relationship" to just end or fade away. Is there any advice anyone could give me to help or any solution?