I always had a rough time for about two weeks after I came home or Steven left after a visit. But, life goes on and you have to get on with it. If you and your bf and truly meant to be together, everything will work out fine. Worrying will NOT make someone stay with you, nor will asking them everyday if they still want to be with you, etc..
That said..it takes two to make a relationship and because I just went through what you are going through (saving up to move to another country) I can tell you that if I was trying to save every cent to have a new life in the same country with my husband and he was spending the money the way your bf seems to be, there would be a problem. There are two sides to every story, but unless he makes a lot of money, a trip to Hungary seems a bit unnecessary.
Good luck.
P.S. Steven and I spoke everyday when we were apart. Sometimes just for ten minutes, sometimes for three hours. It just depended on what was going on.