I have to say crohns can be exhausting. I think a lot of us also suffer in silence. I never want to burden my bf with my symptoms. I think back to when i had flare ups and I just wanted to lay in bed with a hot pad and rest. It can be physically and emotionally draining. I will say just be supportive- which i am sure that you considering you are on this forum. I hope she is seeking help with her crohns. Once she is feeling healthier her fatigue should decrease.