"So what did you get up to today?"
"I basically slept all day."
"Lucky! I'm so jealous, I wish I could sleep all day..."
I experience this conversation often, as do many people with a chronic illness. I'm not offended by it. I'm sure you really would have rather spent the day in bed than experience your crazy and stressful day.
As long as you don't forget that the reason I slept all day is because every time I stood up, I started to lose my vision and felt like I was going to vomit. My head pounded and everything spun. I felt like hell and the only way to endure it was to stay in bed.
So it's a little strange when someone tells me they're jealous of my day. I sure don't feel lucky to have been stuck in bed all day. In fact, I would trade almost anything to be able to go to work or school.
But I know that people don't really mean they're jealous of my situation, they just like the idea of sleeping, instead of being busy and tired. I understand that you're not implying that I have it better off.
Try to keep this in mind though the next time you're talking to someone else with a chronic illness. Many people who are stuck in bed all day can feel quite hurt by these comments.