While I don't have experience with this particular dynamic, I am well-seasoned when it comes to long-distance relationships. My suggestion is to keep yourself busy. Don't allow thoughts about this coupling to consume your waking hours, or the time will drag by (been there, done that). No matter how exciting a new relationship is (and I know, they can seem absolutely amazing!), life doesn't come to a standstill and revolve around that person. We always have adult responsibilities to tend to, and keeping busy makes a wait like this seem to pass so much faster.
That said, I feel an obligation to voice my concern about you agreeing to a TiH position via long-distance agreement. Have you decided on this before meeting him? It's good to converse as you're doing now, through texts, calls, and video-chats. But I think it's crucial to meet first, in a safe public place, and get to know him in person before making any long-term plans with him. He should earn the position of HoH (and his status of "owning" you) by proving himself worthy of it. Take time to read the safety section of the forum so that you're armed with good "street smarts." And never accept such a big step blindly because someone agrees to it from afar.