If you're really friends she'll deal with it in a positive way. If not, she won't. Nothing except the illusion of your friendship. If you tell her you'll find out where you really stand in the relationship. Only you can answer that.
Physical distance is an interesting challenge to a relationship.
If the two of you want to make it work, either as friends or something more intimate, you'll find a way. You'll find that way together. That's up to you. Please choose wisely. A lot is at stake here.