I got engaged in october & when my fiance & I talked about it, we talked only about what style I like. Never talked about carat size on the diamond, I had been ring shopping & I know how much it costs. Some girls do need that huge rock to be happy, but they will always want the bigger, better, trendy things. That's a personality trait my friend. Did she say anything about the proposal? I can't believe someone said it's too small. If the ring wasn't her style, or even if it's not exactly what she wanted, that's not the time to say anything. It takes a lot to ask someone to marry you, I remember how weird my fiance was acting the day he asked me. He was acting weird cause he was so nervous, it was so cute though and that is what I remember. Not the size of the ring. I think it would be good for you two to talk about it and see how the conversation goes, if she's not receptive to your feelings about that I'd maybe take a break to see if she is the one for you. Best of luck