I'm going to have to go against the tide here and say I think I see where your girlfriend is coming from. Granted, she's acting like a total spaz about it and it is WAY too soon in your relationship to be making these demands but I'm not sure that her instincts are wrong about your friend, and this is why:
Originally Posted by BlueStar
5) I don't know if the friends seeing anyone.
6) We're pretty close.
In regards to 5, yes, thank you for calling this to my attention. The fact that I don't know this likely does mean something more than what's on the surface. I haven't asked this as, and this plays relevance to the entire story, I previously rejected this friend as anything potentially more. She did want more and I told her I did not. She accepted this and we remained friends. I decided not to ask about her love life.
Dude, don't you think that's a little odd? You're "close" with her and you don't even know if she's seeing someone?
As mentioned above, yes, I agree.
Would you call your friendship reciprocal, or is she just there for you, providing all kinds of emotional connection without really sharing her own stories? If so, I see an attachment that goes beyond simple friendship.