Does she take you seriously?
The fact that whenever I mention going to visit her, she nearly always asks the same thing, "Are you serious?" So maybe she doent believe me.And I have postponed once already, but that was because she graduates in oct and I thought it would be better to wait till then when we can spend more time together.

You want to dump her because she lied to you about having facebook?
I guess because I enter into a relationship being honest I expect the same.