Oh that
is a bit of a drive. You may be able to express your concerns initially, but I think that what's far more important is that you can emotionally reinforce her good choices while allowing her the space to make poor choices without judging her, even if you knew what would happen all along.
Of course allowing her to make poor choices doesn't mean enabling her by telling her that it's always ok, but it does mean not projecting disappointment or anxiety onto her because of your own negative opinions about those choices or the results.
I think that getting her to open up will take a lot of self-discipline and self-awareness because the fact that you care for her a lot is going to cause you to want to do all kinds of stuff that would likely push someone her age away. You need to hold yourself to some degree of separation and know that she will make mistakes and will likely close some doors, the same as most of us probably do at that age.
Edit: Oh, psh
@Misadventure swooping in here and solving sh** while I'm typing this rambling response!