Maybe time will help, along with your reflections and moving on?
As for your feeling nauseated - this in a way reminds me of some of my reactions to an acquaintance (I've never mentioned this to anyone, and not to my friend either) - but for quite a while - when we would go out for a meal to the nicest spots in town, then towards the end of our meal I would feel nauseated (unexpectedly) - so I would excuse myself - head to the ladies washroom - and throw up. This has happened too many times (only when I've been with this person) - and I am thinking it's got something to do with the tension that I must have felt when with this person (or maybe there has been something about the person that was bothering me, or else maybe I found myself feeling uncomfortable/awkward in a peculiar situation?). Not sure. Things have improved somewhat when I'm around this friend, thankfully. It might be my thoughts that contributed to my physical nausea?
Hope that you find a way to get beyond this.