Wow, this sucks. I'd have to say from my experience that in this case honesty is the best policy. I'd let her know how you feel about her and express to her your concerns with this decision. I would let her know that you are supportive of whatever decision she makes. Couple questions if it's ok... first how long have you 2 been together? Also, how far away is this school she's considering going to? If you two are serious about this relationship, two years will behard but do-able. I wish you the best.