I have a question about this. I am an American visiting France. I leave in a week, my trip here will be exactly 90 days. According to the laws, I can only be in all of the EU for 90 out of 180 days. My passport was not stamped when I flew into Paris. I was thinking about overstaying on my passport to spend Christmas with my boyfriend (he's French), but I don't want to risk getting banned from the EU for a long time. So, what my question is, do they really enforce having to leave the EU for 90 days before I can return? I would like to return to the USA for a month or two to tie up some loose ends, then come back to France so my boyfriend and I can get married. Does anybody have any experience or input about this?