So, I'm an atheist but..?

I don't know if I should include that fact on a collage I'm doing for my cl (it's a who are you? collage that's being put up on the office wall). I'm homeschooled, so I see my teacher once a week and we talk quite a bit and I like her, and I know she's a devout christian. I'm afraid that if she finds out I'm an atheist she will think of me differently, and see me more negatively. Do you think I should just stand up for my values, and not care if she might like me a bit less?