I've got to throw my two cents in here. I'm still waiting for my test results, so I'm not sure if I have celiac yet or not, but I have been dealing with digestive issues since I was a teenager.
When it comes to people in your life, be they friends, family or significant others, the most important thing is when you get sick, just to have someone to talk to who takes it seriously, knows you're not a drama queen, and will cheer you up, or bring you something from the store, offer to stop by with a movie to watch or just call and see how you're doing, or understand when you just want to be alone in your misery, but not hold it against you when it's over.
When you get sick from something like this, it can be humiliating. Having friends who are understanding is a real treasure. Because there are people who tell you it's all in your head, or act like you're somehow at fault.
You know how they say that everyone has different kinds of friends? You've got the friends that you can hang out with, but not really talk to about something serious. Then there are the friends who you can talk to, but when the chips are down they aren't really going to do anything to help. And then there are the friends who will drop whatever they're doing to help when you need it.
Well, when you have digestive issues, or any kind of chronic condition, there's an even closer circle of friends; those you can call when you're sick. Most people aren't tough enough.
If you can just be her friend and be understanding of her life, even if you never have a romantic relationship, I'm sure she'd count herself lucky to have you in her life.
And like I tell my single guy friends -- Girls know girls. So the more girl FRIENDS you have, the more potential GIRLFRIENDS you'll meet.
Nancy