This is a common issue amongst the majority of guys, you start talking to a girl you like she shows intrest then she ghost. I think that this is their game, trying to make you chase and test how invested you are. As a guy there is now correct way to handle this, the only thing you can do is find other options to see that she is not special and at the same time you demonstrate preselection by showing that other girls my win you over. (working on your physical and financial life is a must) This is my take on this matter (I may be wrong) feel free to add your opinion.