Keep in mind that some of this may be a bit generalized (obviously not is this way); the opinions shared are simply based on my own experience and observations. And for independent North Americans, can even be considered clingy.
But in Brazil, it seems that is in a Facebook relationship if they are in a relationship with someone – my ex-boyfriend said that his friends thought I had something to hide simply because I didn’t want to announce my relationship status on Facebook (in the end, I succumbed).
From my experience, many Brazilians tend to throw around the word “namorar”, not holding much meaning to it.
My ex-boyfriend and I only waited 10 days after meeting to become an official couple – and I remember he said that was a long time for him (he was trying to be patient because I’m American).
Americans like to go out with their friends and have “girls nights” – same goes for guys.
This was a fairly novel concept to my ex – because in Brazil, it’s strange to go out without one’s significant other – the guy knows that his girlfriend will likely get hit on and cannot stand that.
In the US, we even have a word for discussing the relationship status, since people normally date more than one person at once – DTR or Define The Relationship.