I'm wondering if after the Clare thing the producers imposed some guidelines on Katie. Her refusal to say she loved him, and her prompts for him to trust the process, etc. were old school bachelor/ette to me. I do believe that without completely saying he was the one, she said it. Thing is, it is a show, getting roses and moving forward are the way they'll end up being together. What she was saying was giving him reassurances without coming right out and saying "you're the one."
I feel like there were huge chunks taken out of this whole thing because I though Greg sounded like a crazy, ma