Well, Im not really familiar with Australia, so how far is the trip from where she is to you?? If I read that correctly, she is going to be in Australia for 1/2 year, correct??
Well depending on the distance of the trip, I would say go for it. But in all honesty, I wouldnt let it get to your head. In a perfect movie love story, it would be the most incredible 1/2 a year for both of you and you would fall crazy in love and she would move down there and be with you forever, or vice versa. But in reality, thats not likely to happen. So I would enjoy her, do whatever and have no regrets.
Think of her this way, its just gonna be a 1/2 fling. Kind of like a summer fling, but extended.
Little criticism: I dont know if you spilled your guts to her, but you made a DJ mistake by jumping to far ahead with your feelings. That was a mistake. But Ill cut you some slack, you're human it happens (God knows I've done it before). But try and look past that for now. Instead, focus on enjoying the time with the 3 other dates you said you got.
Have fun, dont take it too serious. If shes really into you, she will bring up the conversation.