I agree with what has mostly be already said. Long distance relationships are hard, and I will agree that communication is key. You really should talk to her and find out what is going on. Tell her you would like to be able to talk to her for a few minutes a day. It is not unreasonable. There are several ways you can communicate, such as email, instant messaging, and webcam through GoogleChat or AIM. All of these things dont have the charges that go with phone calls and text messaging (if that happens to be something that is bothering her about talking to you). You also need to keep in mind that she is in a different time zone. Depending on where in Europe she is, she probably has at least a 5-6 hour time difference from you, and that may be affecting things as well.

College is very busy and very exciting. If she's only been there for a few weeks, she might still be getting used to all the exciting new things surrounding her. Try not to be quick to judge. Understand that she wants to enjoy her time over there, but that doesn't mean she is cheating on your or losing interest -- she could just be busy. But at the same time, if she isn't willing to talk about talking every day, isn't willing to make you feel like you are still a part of her life even though you guys are so separated, then perhaps you need to rethink the relationship...

I hope everything works out for the best. Keep us posted.
Best wishes,
Ro