Anastasia Makus, a 21-year-old student in Freiburg im Breisgau, Germany, originally planned to spend her summer holiday in the Balkans with her boyfriend. The trip was one of the first things they had discussed in their relationship when they first met about a year ago. “It was happening,” Makus tells PEOPLE about the vacation. “We had the tickets booked already in early April. We were planning the routes, where to stay, the car, everything."