Let me tell you something as a guy with ASD. You didn't do anything wrong. Most people would rather be alone when they puke, so nothing was wrong there. It was the fact that you just kept thinking about it that was wrong. Don't think too hard about these types of things, they bring you down to the ground. Also, your friend probably forgot about it anyway. It's no big deal.
Edit: and one more thing, look up some videos on common body language, that helped me a lot.
man_undown t1_istwfid wrote
Reply to TIFU by walking away from a friend vomiting by [deleted]
Let me tell you something as a guy with ASD. You didn't do anything wrong. Most people would rather be alone when they puke, so nothing was wrong there. It was the fact that you just kept thinking about it that was wrong. Don't think too hard about these types of things, they bring you down to the ground. Also, your friend probably forgot about it anyway. It's no big deal.
Edit: and one more thing, look up some videos on common body language, that helped me a lot.