Overseas long distance relationship?

I'm an Aussie guy (19) that met an American girl online (17). She's an awesome girl (i love her accent) and we've webcamed and phoned eachother and i feel a real connection to her. Part of me hates that i feel this way because logically i know it sounds unrealistic and stupid but i can't help it!!!!! I know i'm probably too young for this but all i want to do is go over there and be with her. What do i do??? Should i try and block her out or keep it going???