Exclusivity = boyfriend/girlfriend Some people will try to twist and squirm obnoxiously that there is a "difference", but reality is that is not the case. No one realistically does that, but people often talk about if they want to become girlfriend/boyfriend. I myself see the labels of "dating exclusively," and "boyfriend/girl friend" to be referencing two almost entirely separate things.
It was established early on that neither of us date multiple people at the same time and that we will be/are exclusive.
As I said, a distinction is made occasionally when we talk. Talk to your boyfriend to get things squared away!!!
Who cares what other people do or how they label things ? but I could see how someone might distinguish them.
Is the purpose for your question to clarify your position in your relationship ? I would guess someone who said "we are dating exclusively" are trying to leave a backdoor for themselves but still keep you tied up just for the mean time till they know for sure about you. Dating exclusively means you go out on dates with only one person at a time, presumably for as long as it takes to figure out whether or not you can stand the person enough to be in a relationship.
Plentyoffish dating forums are a place to meet singles and get dating advice or share dating experiences etc.