Welcome to the site!
Is it possible to have your girlfriend come on here and view some of these posts with you? I ask only because it might really help for her to seem them.
I am married to a CFer, we've been together almost 7 years, married almost 4 (in August), we started dating when I was 16 and he was 19, we got married when I was 19 and he was 21. I went through a tough time like this too, I do believe at one point all of us might (i can't speak for others though) but here's what I concluded after much thinking.
Sounds like your are is pretty healthy which is really good but as the nature of CF is, there will likely be complications sometime in the future. I didn't really have people to talk to until I found this site about a year ago, but I just sat down and thought about it all one day. I decided that I was scared about the future and sad of what it might hold, and that's ok, it's natural to feel that way. But I also decided that loving him, being there for him, being in a relationship and having a family was more important to me than all those fears so I was going to just have to work through it, talk to my mom about it, talk to my best friend about it. And now that you have found this site, it's a great place to come and talk about your concerns, get more information about CF (because there is always more to learn, even when you think you might know it all).
He and I also sat down and had a frank coverstaion about a lot of things. Like I could die long before him, I could get in a car accident tomorrow morning or get hit walking across a street. He could get shot walking down the wrong street or eat something he was deathly allergic to. The bottom line that we both concluded is #1, neither of us will live our lives by the limitations that CF could potentially put on it, #2, either of us could die today or tomorrow so lets not dwell on death bur rather enjoy life and try to do all we want (within normal reasonable rmeans.).
Hopefully you find comfort on this site and some friendships as well. I am usually on this site once a day and I also check my email all the time so if you want to talk OR if your girlfriend (when she's ready) wants to talk to someone who's been there, feel free to email me whenever you need to. <a target=new class=ftalternatingbarlinklarge href="mailto:division902@hotmail.com ">division902@hotmail.com </a>
Also, perhaps shes done some research on CF and learned that a lot of men with CF have infertility problems (I take it from your posting you are a male but if not, I am sincerely sorry)? That really freaked me out, but adapt and overcome! She might find my website of interest, <a target=new class=ftalternatingbarlinklarge href="http://www.cysticfibrosismaleinfertility.com ">www.cysticfibrosismaleinfertility.com </a>. My husband and I will know on the 21st if we are pregnant or not, and it IS biologically her child. I am not sure if that is part of the issue, but quite honestly it can be for a lot of women.
Come back for more advice and support whenever you need it!