I think XXFJs just tend to be more open with emotions in general.
As an XNFP, I am not open about my own emotions at all.
I'm not even sure if I could do that with 'my true love' wherever she might be.
I have a deep and private inner life- one that doesn't stem from introversion- but rather, if anything it stems from Intuition, having a rich imagination and rich fantasies.
It's not necessarily a difference between introversion/extraversion. When I'm extraverting, I don't openly talk about my private life with people. I think that many Extraverts are actually MORE private about their inner life than those Introverts, simply because Extraverts often have a better idea of what to do and what not to do in social situations.