Hi Hooah,
Not that I'm in a position to give advice, seeing as how I'm on my third husband. Wait maybe that does put me in the position?
Anyway, it sounds to me that ICANT is right on about this, that this woman is not a good Catholic to begin with. As such she is in no position to judge you and IMO is a hypocrite.
If she is unwilling to compromise on this issue, what other issues will she be uncompromising about? Is she someone that is open minded about other things?
Relationships are a two way road. Any other way and it boarders on abusive, IMO.
I, myself, am a very easy going, compromising person, but on this one issue I'm not. Before I met my current husband, when I was dating, I made it a point to never date anyone that wasn't an atheist, agnostic or maybe a Buddhist. As I feel that it is very important for a couple to be on the same page when it comes to religion and differences of world view. I did a lot of Internet dating and I even went so far as to state so in my profiles "Please no Christians, Thank you!"
Best of luck to you on coming to a resolution on this issue!