I'd say no at the off chance you ruin everything. The reality of it is that when you tell a girl you love her, especially if they don't feel the same way about you, they get incredible awkward and distant. If you want to still keep in touch with her after she is gone it is best if you avoid a romantic movie-type move.
If she does feel the same way about you and you tell her and she tells you, then the seperation will be all the worse. Perhaps, however, you guys could still remain good friends and keep a long distance relationship, but I have never been a fan of long distance relationships.
However... some girls are romantically driven and this could lead into something... different.. I say no, but do what you want.