Im visiting family in Europe this summer. I started seeing this girl beginning of summer, and things were great. We would meet almost every night when I was in her city, and even though in the beginning it was hard, I worked around the fact that she was playing hard to get. Every time we were together would turn into a makeout session

Fastforward. I went away for two weeks on vacation (in Greece), and we speak a few times on facebook, but not too often-- limited internet. Two weeks go by, and now Im in her city again for a few more days. Yesterday I text her (not gunna lie, I was kind of excited to see her) : "Hey, where are you tonight?" No response. This is coming from a girl who would call me out every day, and whos responses came back at me before I even put the phone down. Since I'm here for only a couple days, (normally I wouldn't do this) I message her again the next day on fb:
DM: "Hey Im in the city here to say my goodbyes to everyone. Hit me up so we can meet "
HER (3 hours after seeing the message) : "Hey, if i can i'll let you know

"
What gives? I havent responded yet and am wondering if I should. I need advice on this situation. What should I say, and what can I do if she does text/call? The worst part of this whole situation is that I cant believe she doesn't even have time to say goodbye. I feel like just saying f*** it and peacing it without talking to her again.
Thanks