Aw. Things like that can get under any person's skin. I would have felt pretty hurt if that happened to me, personally, but its like you said, that's life!
Its definitely my issue, and not my husband's fault. I also enjoy looking at attractive men from time to time, I mean, look at my avatar for goodness sake.
I'm guilty of this too. *hides face*
It is good that you take life's adversity and turn it into a work of art. I love it when people do that, actually, it makes the art more realistic.
This is why I enjoy reading about the inferior functions so much, and how drastic people's personalities changes when they are under a pressing situation. INFP have inferior Te, which makes them surprisingly cold and overly logical against others, and have lower tolerance for incompetence in other people.
It sounds like your friend is just having a very hard time accepting herself as she is and that is definitely not type related, as any and all type can succumb to that kind of mindset. I hope she feels better!
This is probably why I keep seeing and hearing INFJs coo about that Titanic movie. Its the perfect romantic story for them: Idealism, getting saved, soul mates, eternity themes, life after death, karma, etc. I'd say pretty much nearly all my stories are romance related. I can't help it, its fun to write that.
She doesn't hate you. I think she's just extremely angry at herself and is just lashing out. I know this because I do that and then I get embarrassed of myself and react in hostility to somehow gain control of the situation and not rub too much salt in our wound. She'll probably come back soon, although maybe it doesn't hurt to send her a casual and friendly line after a few weeks of space.