Caroline
Yeah, she is. As for Galinda, she's complicated. This guy from their world completely messed with her and her sense of self worth. Even knowing she seeks love and approval, he had no issue using her for sex and flip flopping on if he wanted her or Elphie, led her on repeatedly so now she tries to hide the fact she doesn't think she deserves love.
Both of them, really. Elphie at least has admitted her feelings, Galinda? I don't think she knows what her feelings are because of the mess Fiyero caused and not wanting to ruin her friendship with Elphie. But there are moments when she says or does something that is definitely more than friendship.