Re: girl problems
Ouch. Not a good sign. Well you already know not to be her emotional tampon.
You could run a bf destroyer. But could backfire since they aren't actually together and she isn't complaining about him. Such as how he treats her.
You could keep being vague with your responses, but it's still pretty bad to even do that. Try changing the subject.
You can be a little more direct with your interest. Say something like "Do you always flirt with guys by talking about other men? Not really into that sort of thing hun." Or you could try "Are you trying to get me jealous? Ok you win. I'm jealous. I'm going to go cry and pour my feelings into my diary." All playfully of course.
"All things are subject to interpretation. Whichever interpretation prevails at a given time is a function of power and not truth."