I also specialise in GFE but the E can only start when they've booked me and paid at the beginning of the hour. You have to earn the longer bookings and dinner dates as all your first-time genuine clients aren't going to risk wasting money on a newbie by going straight on a long booking. Once they've sussed that your profile and photos are accurate and you give a good service they'll be more likely to become regulars and take you out to dinner or whatever the next time they book you. You shouldn't get confused about real emotional connections and keep everything professional. At the end of the day they're not your friends and GFE is just another service.

You should worry more about learning how to screen properly first.