jlbraun,
Deep breath, let it out slowly.
Been following this thread since its inception and wondered why no one ever pointed out that there are a lot of people who, never having had any experience with violence, home invasions, or any kind of attack, do not *really* believe such things are possible.
There is a mindset that says, if you prepare for a disaster, you will precipitate one. It is irrational, magical thinking - making sure there is air in your spare tire is asking for a flat; having a first-aid kit makes you accident prone; taking a CPR class will bring on a heart attack.
This attitude is reinforced in that some (probably not many - none that I know) persons who regularly carry may be prone to get into altercations they could have avoided (again: no one I know). There is a saying that one should never go anyplace armed that one would be afraid to go unarmed.
This is a long-winded way of saying the lady is afraid to confront the reality of someday actually being faced with someone who wants to hurt her. Many people go through life without ever being in a life-threatening situation. Actually thinking about, and preparing for, something as "unthinkable" as a home invasion is "creepy" to these people because it makes the home invasion real to them, and that is uncomfortable.
She is young. I think maybe both of you are young. Time and experience may temper her fears; or maybe not, maybe she will live a long, happy life in her condition-white cocoon.
It is not up to you to damage her unrealistic outook; it is up to you to respect her feelings and help her confront her fears, and slay her dragons, *if and when she asks you to do so* - and it is up to you to look for someone more compatible with whom to share your future.
Good luck in your quest, and don't count her out of the picture for several weeks yet - she might just pick the newspaper up and read about an incident of the exact thing you wish to arm yourself against, and finally get the point.
Regards,
Andrew