I have a co-worker. She is a super sweet person, smart, kind and always tries to look her best. Recently, she started smiling less and less. I asked another co-worker what was going on. Turns out, a while ago , she started seeing some guy. Last week, she got really angry after he sent her a text at work. In it he referred to her as "my girlfriend" . I asked how long they had been dating.... 3 months. Her response to him was something like "yes, i'm your girlfriend, just don't tell everybody".

I thought after 3 months of dating exclusively, you were a couple by default. I was left kind of confused about the whole thing and her reaction.

How soon before you can be considered a couple? Ladies, was her response appropriate?