“Regina knows that happiness doesn’t lie in a man, that it does come from within. There are some other sides of Regina that we’ve yet to explore and some inner demons she has to confront.”
“What I’ve learned with Regina is that even though she’s a very temperamental and outspoken woman who speaks her mind and really is fearless, there’s a privacy within her. She doesn’t really talk about the things that are really hard. She does in moments to the right person, but ultimately I think she harbors a lot of secrets and I think what we’re going to see over the course of the season — and hopefully next season, since we know that’s happening now — is that we’ll be exploring more of her inner demons and struggles. I think there’s a lot there that we’ve yet to explore. I don’t want to give too much away, but I think that she’s still discovering what it means to be happy, truly happy, and I feel very lucky to take the journey with her.”
I found that in an interview with Lana Parilla, so maybe it is Robin, maybe they’re going with the idea that a man isn’t her happinness, as she said in 4×22…
(link to the interview : http://www.bustle.com/articles/146344-emma-reginas-once-upon-a-time-relationship-will-continue-to-grow-in-season-5b-star/image/712491)