The best advice is... Date someone that also has celiac disease and your problems are solved. I have also had issues with dating related to eating out and requesting that my date brushes her teeth before kissing. And I have never dated anyone that has celiac disease so I'm not sure if it would make such a difference but it sure would make life easier in so many ways.
If you like gluten-free tiramisu or at least if you are willing to make it with someone then I'm your next date!
I have been dreaming about gluten-free tiramisu ever since someone here got my thoughts on trying some.