When was the second time?
While I don't disagree, Naruto is right now so firm in his belief of her dedication to Sasuke that I don't think he'll do anything until he's convinced that is not true. That's why I think she'll make the move.
Naruto had her say it a second time at the start of chapter 469. Actually she said it more than twice in that encounter. (469-70)
No, I'm sure Naruto got it that Sakura is in love with him during that encounter. He seemed to be perfectly able to accept that Sakura could be in love with himself as well as Sasuke. It was Sakura's firm belief that she had rid herself of any feelings for Sasuke whatsoever, that Naruto was telling her that she was lying to herself about.
Naruto also sure looked to be accepting that Sakura is in love with him now when Sai confronted Naruto about that in 474, he just insisted on Sakura's feelings about Sasuke- that he had observed when she was 12. Note the difference in his mental image of Sakura during that conversation- when Sai talks about Sakura's feelings Naruto, he sees Sakura as she is now. When Naruto speaks insistently of Sakura's feelings for Sasuke, Naruto sees Sakura as her 12 year old self, he doesn't even see her as she was at 13 when he made the Promise of a Lifetime to her. And note Sai's firm words made that 12 year Sasuke fangirl Sakura mental image shatter in Naruto's head. That's as significant as Sakura seeing 12 year old Sasuke in her head when she freezes up, not being able to stab Sasuke in the back. those past images point to memories of emotional bonds. While when Sakura thinks of Sasuke now it makes her feel ashamed of herself and sick that she failed in removing any trace of those emotional bonds to Sasuke.
Naruto and Sakura's interactions immediately after his rescue of her from Sasuke have a vibe of mutual intimacy between them. And Naruto's mental image of Sakura when he thinks of introducing her and the rest of his age peers to his mother reinforces he's aware of her feelings for him.
The confession, as fumbling as it was, did achieve two things Sakura wanted it to- to free Naruto from that wall he had made around doing anything to show his feelings for Sakura, and to let him know she loves him too. That tends to point to Naruto finally making a move in part 2, and Sakura responding positively. (like the vibe we saw between them when he rescued her from Sasuke.) The long awaited Naruto finally kissing Sakura's forehead scene is a definite possibility...
Dream you dream alone is only a dream, but dream we dream together is reality- Yoko Ono 1971
When you go to war, both sides lose totally- Yoko Ono
Remember, our hearts are one. Even when we are at war with each other, our hearts are always beating in unison- Yoko Ono 2009