I immediately go NC when I hear the boyfriend line. Here is why:
If she's interested, you won't ever hear that bf line. You wouldn't believe how ridiculous a girl will be to rationalize/justify going out with a guy that she is really interested in alone when she has a bf. She will somehow turn the blame on her bf and act like the victim to be with you. Then she will tell her bf "well it just happened". Right. It just "happened" on its own.
What if it is a "sh1t test"? Anyone following my advice recently will know that I feel sh1t tests are actually
very rare and most of the time a "sh1t test" is really disinterest which has been misinterpreted as a sh1t test. Most people just read too much PUA garbage and don't know the difference.
What if it really is a sh1t test? Okay, let us say for the sake of argument that it really is a sh1t test. Here is the deal: girls have WAY more options than the average guy. They can play these games till the cows come home for sh1ts and giggles simply because they have options and they can afford to play. The only way to win this game as a guy is to never play. Otherwise, you will spend the entire balance of your relationship with her jumping through every hoop she displays like a show dog.